summaryrefslogtreecommitdiff
path: root/doc/user.xml
blob: a739046bfd2b0ef1d9b1cc9d40b43b25c6618bf6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
<?xml version='1.0' encoding="utf-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
                      "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">

<book>
  <title>The Music Player Daemon - User's Manual</title>

  <chapter id="intro">
    <title>Introduction</title>

    <para>
      This document is work in progress.  Most of it may be incomplete
      yet.  Please help!
    </para>

    <para>
      <application>MPD</application> (Music Player Daemon) is, as the
      name suggests, a server software allowing you to remotely play
      your music, handle playlists, deliver music (HTTP streams with
      various sub-protocols) and organize playlists.
    </para>

    <para>
      It has been written with minimal resource usage and stability in
      mind!  Infact, it runs fine on a Pentium 75, allowing you to use
      your cheap old PC to create a stereo system!
    </para>

    <para>
      <application>MPD</application> supports also gapless playback,
      buffered audio output, and crossfading!
    </para>

    <para>
      The separate client and server design allows users to choose a
      user interface that best suites their tastes independently of
      the underlying daemon, which actually plays music!
    </para>
  </chapter>

  <chapter id="install">
    <title>Installation</title>

    <para>
      We recommend that you use the software installation routines of
      your distribution to install <application>MPD</application>.
      Most operating systems have a <application>MPD</application>
      package, which is very easy to install.
    </para>

    <section id="install_debian">
      <title>Installing on Debian/Ubuntu</title>

      <para>
        Install the package <application>MPD</application> via APT:
      </para>

      <programlisting>apt-get install mpd</programlisting>

      <para>
        When installed this way, <application>MPD</application> by
        default looks for music in
        <filename>/var/lib/mpd/music/</filename>; this may not be
        correct. Look at your <filename>/etc/mpd.conf</filename>
        file...
      </para>
    </section>

    <section id="install_source">
      <title>Compiling from source</title>

      <para>
        Download the source tarball from <ulink
        url="http://www.musicpd.org/download.html">the
        <application>MPD</application> home page</ulink> and unpack
        it:
      </para>

      <programlisting>tar xf mpd-version.tar.xz
cd mpd-version</programlisting>

      <para>
        In any case, you need:
      </para>

      <itemizedlist>
        <listitem>
          <para>
            a C++14 compiler (e.g. <ulink
            url="http://gcc.gnu.org/">gcc 4.9</ulink> or <ulink
            url="http://clang.llvm.org/">clang 3.9</ulink>)
          </para>
        </listitem>

        <listitem>
          <para>
            <ulink url="http://www.boost.org/">Boost 1.46</ulink>
          </para>
        </listitem>

        <listitem>
          <para>
            <ulink url="https://www.freedesktop.org/wiki/Software/pkg-config/">pkg-config</ulink>
          </para>
        </listitem>
      </itemizedlist>

      <para>
        Each plugin usually needs a codec library, which you also need
        to install.  Check the plugin reference for details about
        required libraries.
      </para>

      <para>
        For example, the following installs a fairly complete list of
        build dependencies on Debian Jessie:
      </para>

      <programlisting>
apt-get install g++ \
  libmad0-dev libmpg123-dev libid3tag0-dev \
  libflac-dev libvorbis-dev libopus-dev \
  libadplug-dev libaudiofile-dev libsndfile1-dev libfaad-dev \
  libfluidsynth-dev libgme-dev libmikmod2-dev libmodplug-dev \
  libmpcdec-dev libwavpack-dev libwildmidi-dev \
  libsidplay2-dev libsidutils-dev libresid-builder-dev \
  libavcodec-dev libavformat-dev \
  libmp3lame-dev libtwolame-dev libshine-dev \
  libsamplerate0-dev libsoxr-dev \
  libbz2-dev libcdio-paranoia-dev libiso9660-dev libmms-dev \
  libzzip-dev \
  libcurl4-gnutls-dev libyajl-dev libexpat-dev \
  libasound2-dev libao-dev libjack-jackd2-dev libopenal-dev \
  libpulse-dev libroar-dev libshout3-dev \
  libsndio-dev \
  libmpdclient-dev \
  libnfs-dev libsmbclient-dev \
  libupnp-dev \
  libavahi-client-dev \
  libsqlite3-dev \
  libsystemd-dev libwrap0-dev \
  libcppunit-dev xmlto \
  libboost-dev \
  libicu-dev
      </programlisting>

      <para>
        Now configure the source tree:
      </para>

      <programlisting>./configure</programlisting>

      <para>
        The <parameter>--help</parameter> argument shows a list of
        compile-time options.  When everything is ready and
        configured, compile:
      </para>

      <programlisting>make</programlisting>

      <para>
        And install:
      </para>

      <programlisting>make install</programlisting>

      <section id="windows_build">
        <title>Compiling for Windows</title>

        <para>
          Even though it does not "feel" like a Windows application,
          <application>MPD</application> works well under Windows.
          Its build process follows the "Linux style", and may seem
          awkward for Windows people (who are not used to compiling
          their software, anyway).
        </para>

        <para>
          Basically, there are three ways to compile
          <application>MPD</application> for Windows:
        </para>

        <orderedlist>
          <listitem>
            <para>
              Build on Windows for Windows.  All you need to do is
              described above already: configure and make.
            </para>

            <para>
              For Windows users, this is kind of unusual, because few
              Windows users have a GNU toolchain and a UNIX shell
              installed.
            </para>
          </listitem>

          <listitem>
            <para>
              Build on Linux for Windows.  This is described above
              already: configure and make.  You need the <ulink
              url="https://mingw-w64.org/"><application>mingw-w64</application>
              cross compiler</ulink>.  Pass
              <parameter>--host=i686-w64-mingw32</parameter> (32 bit)
              or <parameter>--host=x86_64-w64-mingw32</parameter> (64
              bit) to configure.
            </para>

            <para>
              This is somewhat natural for Linux users.  Many
              distributions have <application>mingw-w64</application>
              packages.  The remaining difficulty here is installing
              all the external libraries.  And
              <application>MPD</application> usually needs many,
              making this method cumbersome for the casual user.
            </para>
          </listitem>

          <listitem>
            <para>
              Build on Linux for Windows using the
              <application>MPD</application>'s library build script.
            </para>
          </listitem>
        </orderedlist>

        <para>
          This section is about the latter.
        </para>

        <para>
          Just like with the native build, unpack the
          <application>MPD</application> source tarball and change
          into the directory.  Then, instead of
          <command>./configure</command>, type:
        </para>

        <programlisting>./win32/build.py --64</programlisting>

        <para>
          This downloads various library sources, and then configures
          and builds <application>MPD</application> (for x64; to build
          a 32 bit binary, pass <parameter>--32</parameter>).  The
          resulting EXE files is linked statically, i.e. it contains
          all the libraries already, and you do not need carry DLLs
          around.  It is large, but easy to use.  If you wish to have
          a small <filename>mpd.exe</filename> with DLLs, you need to
          compile manually, without the <filename>build.py</filename>
          script.
        </para>
      </section>
    </section>

    <section id="systemd_socket">
      <title><filename>systemd</filename> socket activation</title>

      <para>
        Using <filename>systemd</filename>, you can launch
        <application>MPD</application> on demand when the first client
        attempts to connect.
      </para>

      <para>
        <application>MPD</application> comes with two
        <application>systemd</application> unit files: a "service"
        unit and a "socket" unit.  These will only be installed when
        <application>MPD</application> was configured with
        <parameter>--with-systemdsystemunitdir=/lib/systemd/system</parameter>.
      </para>

      <para>
        To enable socket activation, type:
      </para>

      <programlisting>systemctl enable mpd.socket
systemctl start mpd.socket</programlisting>

      <para>
        In this configuration, <application>MPD</application> will
        ignore the <varname>bind_to_address</varname> and
        <varname>port</varname> settings.
      </para>
    </section>

    <section id="systemd_user">
      <title><filename>systemd</filename> user unit</title>

      <para>
        You can launch <application>MPD</application> as a
        <filename>systemd</filename> user unit.  The service file will
        only be installed when <application>MPD</application> was
        configured with
        <parameter>--with-systemduserunitdir=/usr/lib/systemd/user</parameter>
        or
        <parameter>--with-systemduserunitdir=$HOME/.local/share/systemd/user</parameter>.
      </para>

      <para>
        Once the user unit is installed, you can start and stop
        <application>MPD</application> like any other service:
      </para>

      <programlisting>systemctl --user start mpd</programlisting>

      <para>
        To auto-start <application>MPD</application> upon login, type:
      </para>

      <programlisting>systemctl --user enable mpd</programlisting>
    </section>
  </chapter>

  <chapter id="config">
    <title>Configuration</title>

    <section id="config_file">
      <title>The Configuration File</title>

      <para>
        <application>MPD</application> reads its configuration from a
        text file.  Usually, that is
        <filename>/etc/mpd.conf</filename>, unless a different path is
        specified on the command line.  If you run
        <application>MPD</application> as a user daemon (and not as a
        system daemon), the configuration is read from
        <filename>$XDG_CONFIG_HOME/mpd/mpd.conf</filename> (usually
        <filename>~/.config/mpd/mpd.conf</filename>).
      </para>

      <para>
        Each line in the configuration file contains a setting name
        and its value, e.g.:
      </para>

      <programlisting>connection_timeout "5"</programlisting>

      <para>
        For settings which specify a filesystem path, the tilde is
        expanded:
      </para>

      <programlisting>music_directory "~/Music"</programlisting>

      <para>
        Some of the settings are grouped in blocks with curly braces,
        e.g. per-plugin settings:
      </para>

      <programlisting>audio_output {
    type "alsa"
    name "My ALSA output"
    device "iec958:CARD=Intel,DEV=0"
    mixer_control "PCM"
}</programlisting>
    </section>

    <section id="config_music_directory">
      <title>Configuring the music directory</title>

      <para>
        When you play local files, you should organize them within a
        directory called the "music directory".  This is configured in
        <application>MPD</application> with the
        <varname>music_directory</varname> setting.
      </para>

      <para>
        By default, <application>MPD</application> follows symbolic
        links in the music directory.  This behavior can be switched
        off: <varname>follow_outside_symlinks</varname> controls
        whether <application>MPD</application> follows links pointing
        to files outside of the music directory, and
        <varname>follow_inside_symlinks</varname> lets you disable
        symlinks to files inside the music directory.
      </para>

      <para>
        Instead of using local files, you can use <link
        linkend="storage_plugins">storage plugins</link> to access
        files on a remote file server.  For example, to use music from
        the SMB/CIFS server "myfileserver" on the share called
        "Music", configure the music directory
        "<parameter>smb://myfileserver/Music</parameter>".  For a
        recipe, read the <link linkend="satellite">Satellite
        MPD</link> section.
      </para>
    </section>

    <section id="config_database_plugins">
      <title>Configuring database plugins</title>

      <para>
        If a music directory is configured, one database plugin is
        used.  To configure this plugin, add a
        <varname>database</varname> block to
        <filename>mpd.conf</filename>:
      </para>

      <programlisting>database {
    plugin "simple"
    path "/var/lib/mpd/db"
}
      </programlisting>

      <para>
        The following table lists the <varname>database</varname>
        options valid for all plugins:
      </para>

      <informaltable>
        <tgroup cols="2">
          <thead>
            <row>
              <entry>
                Name
              </entry>
              <entry>
                Description
              </entry>
            </row>
          </thead>
          <tbody>
            <row>
              <entry>
                <varname>plugin</varname>
              </entry>
              <entry>
                The name of the plugin.
              </entry>
            </row>
          </tbody>
        </tgroup>
      </informaltable>

      <para>
        More information can be found in the <link
        linkend="database_plugins">database plugin reference</link>.
      </para>
    </section>

    <section id="config_neighbor_plugins">
      <title>Configuring neighbor plugins</title>

      <para>
        All neighbor plugins are disabled by default to avoid unwanted
        overhead.  To enable (and configure) a plugin, add a
        <varname>neighbor</varname> block to
        <filename>mpd.conf</filename>:
      </para>

      <programlisting>neighbors {
    plugin "smbclient"
}
      </programlisting>

      <para>
        The following table lists the <varname>neighbor</varname>
        options valid for all plugins:
      </para>

      <informaltable>
        <tgroup cols="2">
          <thead>
            <row>
              <entry>
                Name
              </entry>
              <entry>
                Description
              </entry>
            </row>
          </thead>
          <tbody>
            <row>
              <entry>
                <varname>plugin</varname>
              </entry>
              <entry>
                The name of the plugin.
              </entry>
            </row>
          </tbody>
        </tgroup>
      </informaltable>

      <para>
        More information can be found in the <link
        linkend="neighbor_plugins">neighbor plugin reference</link>.
      </para>
    </section>

    <section id="config_input_plugins">
      <title>Configuring input plugins</title>

      <para>
        To configure an input plugin, add a <varname>input</varname>
        block to <filename>mpd.conf</filename>:
      </para>

      <programlisting>input {
    plugin "curl"
    proxy "proxy.local"
}
      </programlisting>

      <para>
        The following table lists the <varname>input</varname> options
        valid for all plugins:
      </para>

      <informaltable>
        <tgroup cols="2">
          <thead>
            <row>
              <entry>
                Name
              </entry>
              <entry>
                Description
              </entry>
            </row>
          </thead>
          <tbody>
            <row>
              <entry>
                <varname>plugin</varname>
              </entry>
              <entry>
                The name of the plugin.
              </entry>
            </row>
            <row>
              <entry>
                <varname>enabled</varname>
                <parameter>yes|no</parameter>
              </entry>
              <entry>
                Allows you to disable a input plugin without
                recompiling.  By default, all plugins are enabled.
              </entry>
            </row>
          </tbody>
        </tgroup>
      </informaltable>

      <para>
        More information can be found in the <link
        linkend="input_plugins">input plugin reference</link>.
      </para>
    </section>

    <section id="config_decoder_plugins">
      <title>Configuring decoder plugins</title>

      <para>
        Most decoder plugins do not need any special configuration.
        To configure a decoder, add a <varname>decoder</varname> block
        to <filename>mpd.conf</filename>:
      </para>

      <programlisting>decoder {
    plugin "wildmidi"
    config_file "/etc/timidity/timidity.cfg"
}
      </programlisting>

      <para>
        The following table lists the <varname>decoder</varname>
        options valid for all plugins:
      </para>

      <informaltable>
        <tgroup cols="2">
          <thead>
            <row>
              <entry>
                Name
              </entry>
              <entry>
                Description
              </entry>
            </row>
          </thead>
          <tbody>
            <row>
              <entry>
                <varname>plugin</varname>
              </entry>
              <entry>
                The name of the plugin.
              </entry>
            </row>
            <row>
              <entry>
                <varname>enabled</varname>
                <parameter>yes|no</parameter>
              </entry>
              <entry>
                Allows you to disable a decoder plugin without
                recompiling.  By default, all plugins are enabled.
              </entry>
            </row>
          </tbody>
        </tgroup>
      </informaltable>

      <para>
        More information can be found in the <link
        linkend="decoder_plugins">decoder plugin reference</link>.
      </para>
    </section>

    <section id="config_encoder_plugins">
      <title>Configuring encoder plugins</title>

      <para>
        Encoders are used by some of the output plugins (such as <link
        linkend="shout_output"><varname>shout</varname></link>).  The
        encoder settings are included in the
        <varname>audio_output</varname> section.  More information can
        be found in the <link linkend="encoder_plugins">encoder plugin
        reference</link>.
      </para>
    </section>

    <section id="config_audio_outputs">
      <title>Configuring audio outputs</title>

      <para>
        Audio outputs are devices which actually play the audio chunks
        produced by <application>MPD</application>.  You can configure
        any number of audio output devices, but there must be at least
        one.  If none is configured, <application>MPD</application>
        attempts to auto-detect.  Usually, this works quite well with
        ALSA, OSS and on Mac OS X.
      </para>

      <para>
        To configure an audio output manually, add one or more
        <varname>audio_output</varname> blocks to
        <filename>mpd.conf</filename>:
      </para>

      <programlisting>audio_output {
    type "alsa"
    name "my ALSA device"
    device "hw:0"
}
      </programlisting>

      <para>
        The following table lists the <varname>audio_output</varname>
        options valid for all plugins:
      </para>

      <informaltable>
        <tgroup cols="2">
          <thead>
            <row>
              <entry>
                Name
              </entry>
              <entry>
                Description
              </entry>
            </row>
          </thead>
          <tbody>
            <row>
              <entry>
                <varname>type</varname>
              </entry>
              <entry>
                The name of the plugin.
              </entry>
            </row>
            <row>
              <entry>
                <varname>name</varname>
              </entry>
              <entry>
                The name of the audio output.  It is visible to the
                client.  Some plugins also use it internally, e.g. as
                a name registered in the PULSE server.
              </entry>
            </row>
            <row id="ao_format">
              <entry>
                <varname>format</varname>
              </entry>
              <entry>
                <para>
                  Always open the audio output with the specified
                  audio format
                  (<replaceable>samplerate:bits:channels</replaceable>),
                  regardless of the format of the input file.  This is
                  optional for most plugins.
                </para>
                <para>
                  Any of the three attributes may be an asterisk to
                  specify that this attribute should not be enforced,
                  example: <parameter>48000:16:*</parameter>.
                  <parameter>*:*:*</parameter> is equal to not having
                  a <varname>format</varname> specification.
                </para>
                <para>
                  The following values are valid for
                  <varname>bits</varname>: <varname>8</varname>
                  (signed 8 bit integer samples),
                  <varname>16</varname>, <varname>24</varname> (signed
                  24 bit integer samples padded to 32 bit),
                  <varname>32</varname> (signed 32 bit integer
                  samples), <varname>f</varname> (32 bit floating
                  point, -1.0 to 1.0), "<varname>dsd</varname>" means
                  DSD (Direct Stream Digital).  For DSD, there are
                  special cases such as "<varname>dsd64</varname>",
                  which allows you to omit the sample rate
                  (e.g. <parameter>dsd512:2</parameter> for stereo
                  DSD512, i.e. 22.5792 MHz).
                </para>
                <para>
                  The sample rate is special for DSD:
                  <application>MPD</application> counts the number of
                  bytes, not bits.  Thus, a DSD "bit" rate of 22.5792
                  MHz (DSD512) is 2822400 from
                  <application>MPD</application>'s point of view
                  (44100*512/8).
                </para>
              </entry>
            </row>
            <row>
              <entry>
                <varname>enabled</varname>
                  <parameter>yes|no</parameter>
              </entry>
              <entry>
                Specifies whether this audio output is enabled when
                <application>MPD</application> is started.  By
                default, all audio outputs are enabled.  This is just
                the default setting when there is no state file; with
                a state file, the previous state is restored.
              </entry>
            </row>
            <row>
              <entry>
                <varname>tags</varname>
                <parameter>yes|no</parameter>
              </entry>
              <entry>
                If set to <parameter>no</parameter>, then
                <application>MPD</application> will not send tags to
                this output.  This is only useful for output plugins
                that can receive tags, for example the <link
                linkend="httpd_output"><varname>httpd</varname></link>
                output plugin.
              </entry>
            </row>
            <row>
              <entry>
                <varname>always_on</varname>
                  <parameter>yes|no</parameter>
              </entry>
              <entry>
                If set to <parameter>yes</parameter>, then
                <application>MPD</application> attempts to keep this
                audio output always open.  This may be useful for
                streaming servers, when you don't want to disconnect
                all listeners even when playback is accidentally
                stopped.
              </entry>
            </row>
            <row>
              <entry>
                <varname>mixer_type</varname>
                <parameter>hardware|software|null|none</parameter>
              </entry>
              <entry>
                Specifies which mixer should be used for this audio
                output: the hardware mixer (available for <link
                linkend="alsa_output">ALSA</link>, <link
                linkend="oss_output">OSS</link> and <link
                linkend="pulse_output">PulseAudio</link>), the
                software mixer, the "null" mixer
                (<parameter>null</parameter>; allows setting the
                volume, but with no effect; this can be used as a
                trick to implement an <link
                linkend="external_mixer">external mixer</link>) or no
                mixer (<parameter>none</parameter>).  By default, the
                hardware mixer is used for devices which support it,
                and none for the others.
              </entry>
            </row>
            <row>
              <entry>
                <varname>replay_gain_handler</varname>
                <parameter>software|mixer|none</parameter>
              </entry>
              <entry>
                Specifies how replay gain is applied.  The default is
                <parameter>software</parameter>, which uses an
                internal software volume control.
                <parameter>mixer</parameter> uses the configured
                (hardware) mixer control.  <parameter>none</parameter>
                disables replay gain on this audio output.
              </entry>
            </row>
          </tbody>
        </tgroup>
      </informaltable>
    </section>

    <section id="config_filters">
      <title>Configuring filters</title>

      <para>
        Filters are plugins which modify an audio stream.
      </para>

      <para>
        To configure a filter, add a <varname>filter</varname> block
        to <filename>mpd.conf</filename>:
      </para>

      <programlisting>filter {
    plugin "volume"
    name "software volume"
}
      </programlisting>

      <para>
        The following table lists the <varname>filter</varname>
        options valid for all plugins:
      </para>

      <informaltable>
        <tgroup cols="2">
          <thead>
            <row>
              <entry>
                Name
              </entry>
              <entry>
                Description
              </entry>
            </row>
          </thead>
          <tbody>
            <row>
              <entry>
                <varname>plugin</varname>
              </entry>
              <entry>
                The name of the plugin.
              </entry>
            </row>
            <row>
              <entry>
                <varname>name</varname>
              </entry>
              <entry>
                The name of the filter.
              </entry>
            </row>
          </tbody>
        </tgroup>
      </informaltable>
    </section>

    <section id="config_playlist_plugins">
      <title>Configuring playlist plugins</title>

      <para>
        Playlist plugins are used to load remote playlists (protocol
        commands <command>load</command>,
        <command>listplaylist</command> and
        <command>listplaylistinfo</command>).  This is not related to
        <application>MPD</application>'s playlist directory.
      </para>

      <para>
        To configure a playlist plugin, add a
        <varname>playlist_plugin</varname> block to
        <filename>mpd.conf</filename>:
      </para>

      <programlisting>playlist_plugin {
    name "m3u"
    enabled "true"
}
      </programlisting>

      <para>
        The following table lists the
        <varname>playlist_plugin</varname> options valid for all
        plugins:
      </para>

      <informaltable>
        <tgroup cols="2">
          <thead>
            <row>
              <entry>
                Name
              </entry>
              <entry>
                Description
              </entry>
            </row>
          </thead>
          <tbody>
            <row>
              <entry>
                <varname>name</varname>
              </entry>
              <entry>
                The name of the plugin.
              </entry>
            </row>
            <row>
              <entry>
                <varname>enabled</varname>
                <parameter>yes|no</parameter>
              </entry>
              <entry>
                Allows you to disable a input plugin without
                recompiling.  By default, all plugins are enabled.
              </entry>
            </row>
          </tbody>
        </tgroup>
      </informaltable>

      <para>
        More information can be found in the <link
        linkend="playlist_plugins">playlist plugin reference</link>.
      </para>
    </section>

    <section id="config_audio_format">
      <title>Audio Format Settings</title>

      <section id="config_global_audio_format">
        <title>Global Audio Format</title>

        <para>
          The setting <varname>audio_output_format</varname> forces
          <application>MPD</application> to use one audio format for
          all outputs.  Doing that is usually not a good idea.  The
          values are the same as in <link
          linkend="ao_format"><varname>format</varname> in the <link
          linkend="config_audio_outputs"><varname>audio_output</varname></link>
          section</link>.
        </para>
      </section>

      <section>
        <title>Resampler</title>

        <para>
          Sometimes, music needs to be resampled before it can be
          played; for example, CDs use a sample rate of 44,100 Hz
          while many cheap audio chips can only handle 48,000 Hz.
          Resampling reduces the quality and consumes a lot of CPU.
          There are different options, some of them optimized for high
          quality and others for low CPU usage, but you can't have
          both at the same time.  Often, the resampler is the
          component that is responsible for most of
          <application>MPD</application>'s CPU usage.  Since
          <application>MPD</application> comes with high quality
          defaults, it may appear that <application>MPD</application>
          consumes more CPU than other software.
        </para>

        <para>
          Check the <link linkend="resampler_plugins">resampler plugin
          reference</link> for a list of resamplers and how to
          configure them.
        </para>
      </section>
    </section>

    <section id="config_other">
      <title>Other Settings</title>

      <informaltable>
        <tgroup cols="2">
          <thead>
            <row>
              <entry>Setting</entry>
              <entry>Description</entry>
            </row>
          </thead>
          <tbody>
            <row>
              <entry>
                <varname>metadata_to_use</varname>
                <parameter>TAG1,TAG2,...</parameter>
              </entry>
              <entry>
                Use only the specified tags, and ignore the others.
                This setting can reduce the database size and
                <application>MPD</application>'s memory usage by
                omitting unused tags.  By default, all tags but
                <varname>comment</varname> are enabled.  The special
                value "none" disables all tags.
              </entry>
            </row>
          </tbody>
        </tgroup>
      </informaltable>

      <section>
        <title>The State File</title>

        <para>
          The <emphasis>state file</emphasis> is a file where
          <application>MPD</application> saves and restores its state
          (play queue, playback position etc.) to keep it persistent
          across restarts and reboots.  It is an optional setting.
        </para>

        <para>
          <application>MPD</application> will attempt to load the
          state file during startup, and will save it when shutting
          down the daemon.  Additionally, the state file is refreshed
          every two minutes (after each state change).
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>state_file</varname>
                  <parameter>PATH</parameter>
                </entry>
                <entry>
                  Specify the state file location.  The parent
                  directory must be writable by the
                  <application>MPD</application> user
                  (<parameter>+wx</parameter>).
                </entry>
              </row>

              <row>
                <entry>
                  <varname>state_file_interval</varname>
                  <parameter>SECONDS</parameter>
                </entry>
                <entry>
                  Auto-save the state file this number of seconds
                  after each state change.  Defaults to
                  <parameter>120</parameter> (2 minutes).
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="stickers">
        <title>The Sticker Database</title>

        <para>
          "Stickers" are pieces of information attached to songs.
          Some clients use them to store ratings and other volatile
          data.  This feature requires <ulink
          url="http://www.sqlite.org/">SQLite</ulink>, compile-time
          configure option <parameter>--enable-sqlite</parameter>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>sticker_file</varname>
                  <parameter>PATH</parameter>
                </entry>
                <entry>
                  The location of the sticker database.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title>Resource Limitations</title>

        <para>
          These settings are various limitations to prevent
          <application>MPD</application> from using too many
          resources (denial of service).
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>

              <row>
                <entry>
                  <varname>connection_timeout</varname>
                  <parameter>SECONDS</parameter>
                </entry>
                <entry>
                  If a client does not send any new data in this time
                  period, the connection is closed.  Clients waiting
                  in "idle" mode are excluded from this.  Default is
                  <parameter>60</parameter>.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>max_connections</varname>
                  <parameter>NUMBER</parameter>
                </entry>
                <entry>
                  This specifies the maximum number of clients that
                  can be connected to <application>MPD</application>
                  at the same time.  Default is
                  <parameter>5</parameter>.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>max_playlist_length</varname>
                  <parameter>NUMBER</parameter>
                </entry>
                <entry>
                  The maximum number of songs that can be in the
                  playlist.  Default is <parameter>16384</parameter>.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>max_command_list_size</varname>
                  <parameter>KBYTES</parameter>
                </entry>
                <entry>
                  The maximum size a command list.  Default is
                  <parameter>2048</parameter> (2 MiB).
                </entry>
              </row>

              <row>
                <entry>
                  <varname>max_output_buffer_size</varname>
                  <parameter>KBYTES</parameter>
                </entry>
                <entry>
                  The maximum size of the output buffer to a client
                  (maximum response size).  Default is
                  <parameter>8192</parameter> (8 MiB).
                </entry>
              </row>

            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title>Buffer Settings</title>

        <para>
          Do not change these unless you know what you are doing.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>

              <row>
                <entry>
                  <varname>audio_buffer_size</varname>
                  <parameter>KBYTES</parameter>
                </entry>
                <entry>
                  Adjust the size of the internal audio buffer.
                  Default is <parameter>4096</parameter> (4 MiB).
                </entry>
              </row>

              <row>
                <entry>
                  <varname>buffer_before_play</varname>
                  <parameter>PERCENT</parameter>
                </entry>
                <entry>
                  Control the percentage of the buffer which is filled
                  before beginning to play.  Increasing this reduces
                  the chance of audio file skipping, at the cost of
                  increased time prior to audio playback.  Default is
                  <parameter>10%</parameter>.
                </entry>
              </row>

            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="zeroconf">
        <title>Zeroconf</title>

        <para>
          If Zeroconf support (<ulink
          url="http://avahi.org/">Avahi</ulink> or Apple's Bonjour)
          was enabled at compile time with
          <parameter>--with-zeroconf=...</parameter>, MPD can announce
          its presence on the network.  The following settings control
          this feature:
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>

              <row>
                <entry>
                  <varname>zeroconf_enabled</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  Enables or disables this feature.  Default is
                  <parameter>yes</parameter>.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>zeroconf_name</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  The service name to publish via Zeroconf.  The
                  default is "<parameter>Music Player</parameter>".
                </entry>
              </row>

            </tbody>
          </tgroup>
        </informaltable>
      </section>
    </section>
  </chapter>

  <chapter id="advanced_config">
    <title>Advanced configuration</title>

    <section id="satellite">
      <title>Satellite setup</title>

      <para>
        <application>MPD</application> runs well on weak machines such
        as the <ulink url="http://www.raspberrypi.org/">Raspberry
        Pi</ulink>.  However, such hardware tends to not have storage
        big enough to hold a music collection.  Mounting music from a
        file server can be very slow, especially when updating the
        database.
      </para>

      <para>
        One approach for optimization is running
        <application>MPD</application> on the file server, which not
        only exports raw files, but also provides access to a readily
        scanned database.  Example configuration:
      </para>

      <programlisting>music_directory "nfs://fileserver.local/srv/mp3"
#music_directory "smb://fileserver.local/mp3"

database {
    plugin "proxy"
    host "fileserver.local"
}
      </programlisting>

      <para>
        The <link
        linkend="config_music_directory"><varname>music_directory</varname></link>
        setting tells <application>MPD</application> to read files
        from the given NFS server.  It does this by connecting to the
        server from userspace.  This does not actually mount the file
        server into the kernel's virtual file system, and thus
        requires no kernel cooperation and no special privileges.  It
        does not even require a kernel with NFS support, only the
        <link linkend="nfs_storage"><filename>nfs</filename></link>
        storage plugin (using the <filename>libnfs</filename>
        userspace library).  The same can be done with SMB/CIFS using
        the <link
        linkend="smbclient_storage"><filename>smbclient</filename></link>
        storage plugin (using <filename>libsmbclient</filename>).
      </para>

      <para>
        The <link
        linkend="config_database_plugins"><varname>database</varname></link>
        setting tells <application>MPD</application> to pass all
        database queries on to the <application>MPD</application>
        instance running on the file server (using the <link
        linkend="proxy_database"><filename>proxy</filename></link>
        plugin).
      </para>
    </section>

    <section id="realtime">
      <title>Real-Time Scheduling</title>

      <para>
        On Linux, <application>MPD</application> attempts to configure
        <ulink
        url="https://en.wikipedia.org/wiki/Real-time_computing">real-time
        scheduling</ulink> for some threads that benefit from it.
      </para>

      <para>
        This is only possible you allow <application>MPD</application>
        to do it.  This privilege is controlled by
        <varname>RLIMIT_RTPRIO</varname>
        <varname>RLIMIT_RTTIME</varname>.  You can configure this
        privilege with <command>ulimit</command> before launching
        <application>MPD</application>:
      </para>

      <programlisting>ulimit -HS -r 50; mpd</programlisting>

      <para>
        Or you can use the <command>prlimit</command> program from the
        <application>util-linux</application> package:
      </para>

      <programlisting>prlimit --rtprio=50 --rttime=unlimited mpd</programlisting>

      <para>
        The <application>systemd</application> service file shipped
        with <application>MPD</application> comes with this setting.
      </para>

      <para>
        This works only if the Linux kernel was compiled with
        <varname>CONFIG_RT_GROUP_SCHED</varname> disabled.  Use the
        following command to check this option for your current
        kernel:
      </para>

      <programlisting>zgrep ^CONFIG_RT_GROUP_SCHED /proc/config.gz</programlisting>

      <note>
        <para>
          There is a rumor that real-time scheduling improves audio
          quality.  That is not true.  All it does is reduce the
          probability of skipping (audio buffer xruns) when the
          computer is under heavy load.
        </para>
      </note>
    </section>
  </chapter>

  <chapter id="use">
    <title>Using <application>MPD</application></title>

    <section id="client">
      <title>The client</title>

      <para>
        After you have installed, configured and started
        <application>MPD</application>, you choose a client to control
        the playback.
      </para>

      <para>
        The most basic client is <filename>mpc</filename>, which
        provides a command line interface.  It is useful in shell
        scripts.  Many people bind specific <filename>mpc</filename>
        commands to hotkeys.
      </para>

      <para>
        The <ulink
        url="http://www.musicpd.org/clients/"><application>MPD</application>
        Wiki</ulink> contains an extensive list of clients to choose
        from.
      </para>
    </section>

    <section id="music_directory_and_database">
      <title>The music directory and the database</title>

      <para>
        The "music directory" is where you store your music files.
        <application>MPD</application> stores all relevant meta
        information about all songs in its "database".  Whenever you
        add, modify or remove songs in the music directory, you have
        to update the database, for example with
        <filename>mpc</filename>:
      </para>

      <programlisting>mpc update</programlisting>

      <para>
        Depending on the size of your music collection and the speed
        of the storage, this can take a while.
      </para>

      <para>
        To exclude a file from the update, create a file called
        <filename>.mpdignore</filename> in its parent directory.  Each
        line of that file may contain a list of shell wildcards.
        Matching files in the current directory and all subdirectories
        are excluded.
      </para>
    </section>

    <section id="tags">
      <title>Metadata</title>

      <para>
        When scanning or playing a song,
        <application>MPD</application> parses its metadata.  The
        following tags are supported:
      </para>

      <xi:include href="include/tags.xml"
                  xmlns:xi="http://www.w3.org/2001/XInclude"/>
    </section>

    <section id="queue">
      <title>The queue</title>

      <para>
        The queue (sometimes called "current playlist") is a list of
        songs to be played by <application>MPD</application>.  To play
        a song, add it to the queue and start playback.  Most clients
        offer an interface to edit the queue.
      </para>
    </section>

    <section id="stored_playlists">
      <title>Stored Playlists</title>

      <para>
        Stored playlists are some kind of secondary playlists which
        can be created, saved, edited and deleted by the client.  They
        are addressed by their names.  Its contents can be loaded into
        the queue, to be played back.  The
        <varname>playlist_directory</varname> setting specifies where
        those playlists are stored.
      </para>
    </section>
  </chapter>

  <chapter id="advanced_usage">
    <title>Advanced usage</title>

    <section id="bit_perfect">
      <title>Bit-perfect playback</title>

      <para>
        "Bit-perfect playback" is a phrase used by audiophiles to
        describe a setup that plays back digital music as-is, without
        applying any modifications such as resampling, format
        conversion or software volume.  Naturally, this implies a
        lossless codec.
      </para>

      <para>
        By default, <application>MPD</application> attempts to do
        bit-perfect playback, unless you tell it not to.  Precondition
        is a sound chip that supports the audio format of your music
        files.  If the audio format is not supported,
        <application>MPD</application> attempts to fall back to the
        nearest supported audio format, trying to lose as little
        quality as possible.
      </para>

      <para>
        To verify if <application>MPD</application> converts the audio
        format, enable verbose logging, and watch for these lines:
      </para>

      <programlisting>decoder: audio_format=44100:24:2, seekable=true
output: opened plugin=alsa name="An ALSA output" audio_format=44100:16:2
output: converting from 44100:24:2</programlisting>

      <para>
        This example shows that a 24 bit file is being played, but the
        sond chip cannot play 24 bit.  It falls back to 16 bit,
        discarding 8 bit.
      </para>

      <para>
        However, this does not yet prove bit-perfect playback;
        <application>ALSA</application> may be fooling
        <application>MPD</application> that the audio format is
        supported.  To verify the format really being sent to the
        physical sound chip, try:
      </para>

      <programlisting>cat /proc/asound/card*/pcm*p/sub*/hw_params
access: RW_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 44100 (44100/1)
period_size: 4096
buffer_size: 16384</programlisting>

      <para>
        Obey the "format" row, which indicates that the current
        playback format is 16 bit (signed 16 bit integer, little
        endian).
      </para>

      <para>
        Check list for bit-perfect playback:
      </para>

      <itemizedlist>
        <listitem>
          <para>
            Use the <link linkend="alsa_output">ALSA</link> output
            plugin.
          </para>
        </listitem>

        <listitem>
          <para>
            Disable sound processing inside
            <application>ALSA</application> by configuring a
            "hardware" device (<parameter>hw:0,0</parameter> or
            similar).
          </para>
        </listitem>

        <listitem>
          <para>
            Don't use software volume (setting <link
            linkend="config_audio_outputs"><varname>mixer_type</varname></link>).
          </para>
        </listitem>

        <listitem>
          <para>
            Don't force <application>MPD</application> to use a
            specific audio format (settings <link
            linkend="config_audio_outputs"><varname>format</varname></link>,
            <link
            linkend="config_global_audio_format"><varname>audio_output_format</varname></link>).
          </para>
        </listitem>

        <listitem>
          <para>
            Verify that you are really doing bit-perfect playback
            using <application>MPD</application>'s verbose log and
            <filename>/proc/asound/card*/pcm*p/sub*/hw_params</filename>.
            Some DACs can also indicate the audio format.
          </para>
        </listitem>
      </itemizedlist>
    </section>

    <section id="dsd">
      <title>Direct Stream Digital (DSD)</title>

      <para>
        DSD (<ulink
        url="https://en.wikipedia.org/wiki/Direct_Stream_Digital">Direct
        Stream Digital</ulink>) is a digital format that stores audio
        as a sequence of single-bit values at a very high sampling
        rate.
      </para>

      <para>
        <application>MPD</application> understands the file formats
        <link linkend="dsdiff_decoder"><filename>dff</filename></link>
        and <link
        linkend="dsf_decoder"><filename>dsf</filename></link>.  There
        are three ways to play back DSD:
      </para>

      <itemizedlist>
        <listitem>
          <para>
            Native DSD playback.  Requires
            <application>ALSA</application> 1.0.27.1 or later, a sound
            driver/chip that supports DSD and of course a DAC that
            supports DSD.
          </para>
        </listitem>

        <listitem>
          <para>
            DoP (DSD over PCM) playback.  This wraps DSD inside fake
            24 bit PCM according to the <ulink
            url="http://dsd-guide.com/dop-open-standard">DoP
            standard</ulink>.  Requires a DAC that supports DSD.  No
            support from ALSA and the sound chip required (except for
            <link linkend="bit_perfect">bit-perfect</link> 24 bit PCM
            support).
          </para>
        </listitem>

        <listitem>
          <para>
            Convert DSD to PCM on-the-fly.
          </para>
        </listitem>
      </itemizedlist>

      <para>
        Native DSD playback is used automatically if available.  DoP
        is only used if enabled explicitly using the <link
        linkend="alsa_output"><varname>dop</varname></link> option,
        because there is no way for <application>MPD</application> to
        find out whether the DAC supports it.  DSD to PCM conversion
        is the fallback if DSD cannot be used directly.
      </para>
    </section>
  </chapter>

  <chapter id="client_hacks">
    <title>Client Hacks</title>

    <section id="external_mixer">
      <title>External Mixer</title>

      <para>
        The setting '<varname>mixer_type</varname>
        "<parameter>null</parameter>"' asks
        <application>MPD</application> to pretend that there is a
        mixer, but not actually do something.  This allows you to
        implement a <application>MPD</application> client which
        listens for <varname>mixer</varname> events, queries the
        current (fake) volume, and uses it to program an external
        mixer.  For example, your client can forward this setting to
        your amplifier.
      </para>
    </section>
  </chapter>

  <chapter id="troubleshooting">
    <title>Troubleshooting</title>

    <section id="troubleshooting_start">
      <title>Where to start</title>

      <para>
        Make sure you have the latest <application>MPD</application>
        version (via <command>mpd --version</command>, not
        <command>mpc version</command>).  All the time, bugs are found
        and fixed, and your problem might be a bug that is fixed
        already.  Do not ask for help unless you have the latest
        <application>MPD</application> version.  The most common
        excuse is when your distribution ships an old
        <application>MPD</application> version - in that case, please
        ask your distribution for help, and not the
        <application>MPD</application> project.
      </para>

      <para>
        Check the log file.  Configure '<varname>log_level</varname>
        "<parameter>verbose</parameter>"' or pass
        <parameter>--verbose</parameter> to <filename>mpd</filename>.
      </para>

      <para>
        Sometimes, it is helpful to run <application>MPD</application>
        in a terminal and follow what happens.  This is how to do it:
      </para>

      <programlisting>mpd --stdout --no-daemon --verbose</programlisting>
    </section>

    <section id="support">
      <title>Support</title>

      <section id="help">
        <title>Getting Help</title>

        <para>
          The <application>MPD</application> project runs <ulink
          url="https://forum.musicpd.org/">a forum</ulink> and an IRC
          channel (<varname>#mpd</varname> on Freenode) for requesting
          help.  Visit <ulink url="https://www.musicpd.org/help/">the
          <application>MPD</application> help page</ulink> for details
          on how to get help.
        </para>
      </section>

      <section id="faq">
        <title>Common Problems</title>

        <qandaset defaultlabel='qanda'>
          <qandadiv>
            <title>Database</title>

            <qandaentry>
              <question>
                <para>
                  I can't see my music in the
                  <application>MPD</application> database!
                </para>
              </question>
              <answer>
                <itemizedlist>
                  <listitem>
                    <para>
                      Check your <varname>music_directory</varname>
                      setting.
                    </para>
                  </listitem>
                </itemizedlist>
                <itemizedlist>
                  <listitem>
                    <para>
                      Does the <application>MPD</application> user
                      have read permission on all music files, and
                      read+execute permission on all music directories
                      (and all of their parent directories)?
                    </para>
                  </listitem>
                </itemizedlist>
                <itemizedlist>
                  <listitem>
                    <para>
                      Did you update the database?  (<command>mpc
                      update</command>)
                    </para>
                  </listitem>
                </itemizedlist>
                <itemizedlist>
                  <listitem>
                    <para>
                      Did you enable all relevant decoder plugins at
                      compile time?  <command>mpd --version</command>
                      will tell you.
                    </para>
                  </listitem>
                </itemizedlist>
              </answer>
            </qandaentry>

            <qandaentry>
              <question>
                <para>
                  <application>MPD</application> doesn't read ID3
                  tags!
                </para>
              </question>
              <answer>
                <para>
                  You probably compiled <application>MPD</application>
                  without <filename>libid3tag</filename>.
                  <command>mpd --version</command> will tell you.
                </para>
              </answer>
            </qandaentry>
          </qandadiv>

          <qandadiv>
            <title>Playback</title>

            <qandaentry>
              <question>
                <para>I can't hear music on my client!</para>
              </question>
              <answer>
                <para>
                  That problem usually follows a misunderstanding of the
                  nature of <application>MPD</application>.
                  <application>MPD</application> is a remote-controlled
                  music player, not a music distribution system.
                  Usually, the speakers are connected to the box where
                  <application>MPD</application> runs, and the
                  <application>MPD</application> client only sends
                  control commands, but the client does not actually
                  play your music.
                </para>

                <para>
                  <application>MPD</application> has output plugins
                  which allow hearing music on a remote host (such as
                  <link
                      linkend="httpd_output"><varname>httpd</varname></link>),
                  but that is not <application>MPD</application>'s
                  primary design goal.
                </para>
              </answer>
            </qandaentry>

            <qandaentry>
              <question>
                <para>"Device or resource busy"</para>
              </question>
              <answer>
                <para>
                  This ALSA error means that another program uses your
                  sound hardware exclusively.  You can stop that
                  program to allow <application>MPD</application> to
                  use it.
                </para>
                <para>
                  Sometimes, this other program is
                  <application>PulseAudio</application>, which can
                  multiplex sound from several applications, to allow
                  them to share your sound chip.  In this case, it
                  might be a good idea for <link
                  linkend="pulse_output"><application>MPD</application>
                  to use <application>PulseAudio</application></link>
                  as well, instead of using ALSA directly.
                </para>
              </answer>
            </qandaentry>
          </qandadiv>
        </qandaset>
      </section>
    </section>

    <section id="bugs">
      <title>Reporting Bugs</title>

      <para>
        If you believe you found a bug in
        <application>MPD</application>, report it on <ulink
        url="https://github.com/MusicPlayerDaemon/MPD/issues/">the bug
        tracker</ulink>.
      </para>

      <para>
        Your bug report should contain:
      </para>

      <itemizedlist>
        <listitem>
          <para>
            the output of <command>mpd --version</command>
          </para>
        </listitem>

        <listitem>
          <para>
            your <link linkend="config_file">configuration file</link>
            (<filename>mpd.conf</filename>)
          </para>
        </listitem>

        <listitem>
          <para>
            relevant portions of the log file (--verbose)
          </para>
        </listitem>

        <listitem>
          <para>
            be clear about what you expect MPD to do, and what is
            actually happening
          </para>
        </listitem>
      </itemizedlist>

      <section id="crash">
        <title><application>MPD</application> crashes</title>

        <para>
          All <application>MPD</application> crashes are bugs which
          must be fixed by a developer, and you should write a bug
          report.  (Many crash bugs are caused by codec libraries
          used by <application>MPD</application>, and then that
          library must be fixed; but in any case, the
          <application>MPD</application> bug tracker is a good place
          to report it first if you don't know.)
        </para>

        <para>
          A crash bug report needs to contain a "backtrace".
        </para>

        <para>
          First of all, your <application>MPD</application> executable
          must not be "stripped" (i.e. debug information deleted).
          The executables shipped with Linux distributions are usually
          stripped, but some have so-called "debug" packages (package
          <filename>mpd-dbg</filename> or
          <filename>mpd-dbgsym</filename> on Debian,
          <filename>mpd-debug</filename> on other distributions).
          Make sure this package is installed.
        </para>

        <para>
          You can extract the backtrace from a core dump, or by
          running <application>MPD</application> in a debugger, e.g.:
        </para>

        <programlisting>gdb --args mpd --stdout --no-daemon --verbose
run</programlisting>

        <para>
          As soon as you have reproduced the crash, type
          "<command>bt</command>" on the <filename>gdb</filename>
          command prompt.  Copy the output to your bug report.
        </para>
      </section>
    </section>
  </chapter>

  <chapter id="plugin_reference">
    <title>Plugin reference</title>

    <section id="database_plugins">
      <title>Database plugins</title>

      <section>
        <title><varname>simple</varname></title>

        <para>
          The default plugin.  Stores a copy of the database in
          memory.  A file is used for permanent storage.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>path</varname>
                </entry>
                <entry>
                  The path of the database file.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>cache_directory</varname>
                </entry>
                <entry>
                  The path of the cache directory for additional
                  storages mounted at runtime.  This setting is
                  necessary for the <command>mount</command> protocol
                  command.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>compress</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  Compress the database file using
                  <filename>gzip</filename>?  Enabled by default (if
                  built with <filename>zlib</filename>).
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="proxy_database">
        <title><varname>proxy</varname></title>

        <para>
          Provides access to the database of another
          <application>MPD</application> instance using
          <filename>libmpdclient</filename>.  This is useful when you
          run mount the music directory via NFS/SMB, and the file
          server already runs a <application>MPD</application>
          instance.  Only the file server needs to update the
          database.
        </para>

        <para>
          Note that unless overridden by the below settings (e.g. by
          setting them to a blank value), general curl configuration
          from environment variables such as http_proxy or specified
          in ~/.curlrc will be in effect.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>host</varname>
                </entry>
                <entry>
                  The host name of the "master"
                  <application>MPD</application> instance.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>port</varname>
                </entry>
                <entry>
                  The port number of the "master"
                  <application>MPD</application> instance.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>keepalive</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  Send TCP keepalive packets to the "master"
                  <application>MPD</application> instance?  This option can
                  help avoid certain firewalls dropping inactive
                  connections, at the expensive of a very small amount of
                  additional network traffic.  Disabled by default.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>upnp</varname></title>

        <para>
          Provides access to UPnP media servers.
        </para>
      </section>
    </section>

    <section id="storage_plugins">
      <title>Storage plugins</title>

      <section>
        <title><varname>local</varname></title>

        <para>
          The default plugin which gives
          <application>MPD</application> access to local files.  It is
          used when <varname>music_directory</varname> refers to a
          local directory.
        </para>
      </section>

      <section id="curl_storage">
        <title><varname>curl</varname></title>

        <para>
          A WebDAV client using <filename>libcurl</filename>.  It is
          used when <varname>music_directory</varname> contains a
          <parameter>http://</parameter> or
          <parameter>https://</parameter> URI, for example
          "<parameter>https://the.server/dav/</parameter>".
        </para>
      </section>

      <section id="smbclient_storage">
        <title><varname>smbclient</varname></title>

        <para>
          Load music files from a SMB/CIFS server.  It is used when
          <varname>music_directory</varname> contains a
          <parameter>smb://</parameter> URI, for example
          "<parameter>smb://myfileserver/Music</parameter>".
        </para>
      </section>

      <section id="nfs_storage">
        <title><varname>nfs</varname></title>

        <para>
          Load music files from a NFS server.  It is used when
          <varname>music_directory</varname> contains a
          <parameter>nfs://</parameter> URI according to <ulink
          url="http://tools.ietf.org/html/rfc2224">RFC2224</ulink>,
          for example "<parameter>nfs://servername/path</parameter>".
        </para>

        <para>
          This plugin uses <ulink
          url="https://github.com/sahlberg/libnfs"><filename>libnfs</filename></ulink>,
          which supports only NFS version 3.  Since
          <application>MPD</application> is not allowed to bind to
          "privileged ports", the NFS server needs to enable the
          "insecure" setting; example
          <filename>/etc/exports</filename>:
        </para>

        <programlisting>/srv/mp3 192.168.1.55(ro,insecure)</programlisting>

        <para>
          Don't fear: "insecure" does not mean that your NFS server is
          insecure.  A few decades ago, people thought the concept of
          "privileged ports" would make network services "secure",
          which was a fallacy.  The absence of this obsolete
          "security" measure means little.
        </para>
      </section>
    </section>

    <section id="neighbor_plugins">
      <title>Neighbor plugins</title>

      <section id="smbclient_neighbor">
        <title><varname>smbclient</varname></title>

        <para>
          Provides a list of SMB/CIFS servers on the local network.
        </para>
      </section>

      <section id="upnp_neighbor">
        <title><varname>upnp</varname></title>

        <para>
          Provides a list of UPnP servers on the local network.
        </para>
      </section>
    </section>

    <section id="input_plugins">
      <title>Input plugins</title>

      <section>
        <title><varname>alsa</varname></title>

        <para>
          Allows <application>MPD</application> on Linux to play audio
          directly from a soundcard using the scheme
          <filename>alsa://</filename>. Audio is formatted as 44.1 kHz
          16-bit stereo (CD format). Examples:
        </para>

        <para>
          <filename>mpc add alsa://</filename> plays audio from device hw:0,0
        </para>
        <para>
          <filename>mpc add alsa://hw:1,0</filename> plays audio from device
          hw:1,0
        </para>
      </section>

      <section>
        <title><varname>cdio_paranoia</varname></title>

        <para>
          Plays audio CDs using <ulink
          url="http://www.gnu.org/software/libcdio/"><filename>libcdio</filename></ulink>.
          The URI has the form:
          "<filename>cdda://[DEVICE][/TRACK]</filename>".  The
          simplest form <filename>cdda://</filename> plays the whole
          disc in the default drive.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>default_byte_order</varname>
                <parameter>little_endian|big_endian</parameter>
                </entry>
                <entry>
                  If the CD drive does not specify a byte order,
                  <application>MPD</application> assumes it is the
                  CPU's native byte order.  This setting allows
                  overriding this.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>curl</varname></title>

        <para>
          Opens remote files or streams over HTTP using <ulink
          url="http://curl.haxx.se/"><filename>libcurl</filename></ulink>.
        </para>

        <para>
          Note that unless overridden by the below settings (e.g. by
          setting them to a blank value), general curl configuration
          from environment variables such as
          <varname>http_proxy</varname> or specified in
          <filename>~/.curlrc</filename> will be in effect.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>proxy</varname>
                </entry>
                <entry>
                  Sets the address of the HTTP proxy server.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>proxy_user</varname>,
                  <varname>proxy_password</varname>
                </entry>
                <entry>
                  Configures proxy authentication.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>verify_peer</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  Verify the peer's SSL certificate?  <ulink
                  url="http://curl.haxx.se/libcurl/c/CURLOPT_SSL_VERIFYPEER.html">More
                  information</ulink>.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>verify_host</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  Verify the certificate's name against host?  <ulink
                  url="http://curl.haxx.se/libcurl/c/CURLOPT_SSL_VERIFYHOST.html">More
                  information</ulink>.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="ffmpeg_input">
        <title><varname>ffmpeg</varname></title>

        <para>
          Access to various network protocols implemented by the
          <application>FFmpeg</application> library:
          <filename>gopher://</filename>,
          <filename>rtp://</filename>,
          <filename>rtsp://</filename>,
          <filename>rtmp://</filename>,
          <filename>rtmpt://</filename>,
          <filename>rtmps://</filename>
        </para>
      </section>

      <section>
        <title><varname>file</varname></title>

        <para>
          Opens local files.
        </para>
      </section>

      <section>
        <title><varname>mms</varname></title>

        <para>
          Plays streams with the MMS protocol using <ulink
          url="https://launchpad.net/libmms"><filename>libmms</filename></ulink>.
        </para>
      </section>

      <section>
        <title><varname>nfs</varname></title>

        <para>
          Allows <application>MPD</application> to access files on
          NFSv3 servers without actually mounting them (i.e. in
          userspace, without help from the kernel's VFS layer).  All
          URIs with the <filename>nfs://</filename> scheme are used
          according to <ulink
          url="http://tools.ietf.org/html/rfc2224">RFC2224</ulink>.
          Example:
        </para>

        <para>
          <filename>mpc add nfs://servername/path/filename.ogg</filename>
        </para>

        <para>
          Note that this usually requires enabling the "insecure" flag
          in the server's <filename>/etc/exports</filename> file,
          because <application>MPD</application> cannot bind to
          so-called "privileged" ports.  Don't fear: this will not
          make your file server insecure; the flag was named in a time
          long ago when privileged ports were thought to be meaningful
          for security.  By today's standards, NFSv3 is not secure at
          all, and if you believe it is, you're already doomed.
        </para>
      </section>

      <section>
        <title><varname>smbclient</varname></title>

        <para>
          Allows <application>MPD</application> to access files on
          SMB/CIFS servers (e.g. Samba or Microsoft Windows).  All
          URIs with the <filename>smb://</filename> scheme are used.
          Example:
        </para>

        <para>
          <filename>mpc add smb://servername/sharename/filename.ogg</filename>
        </para>
      </section>
    </section>

    <section id="decoder_plugins">
      <title>Decoder plugins</title>

      <section id="adplug_decoder">
        <title><varname>adplug</varname></title>

        <para>
          Decodes AdLib files using <ulink
          url="http://adplug.sourceforge.net/">libadplug</ulink>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>sample_rate</varname>
                  <parameter></parameter>
                </entry>
                <entry>
                  The sample rate that shall be synthesized by the
                  plugin.  Defaults to 48000.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="audiofile_decoder">
        <title><varname>audiofile</varname></title>

        <para>
          Decodes WAV and AIFF files using <ulink
          url="http://audiofile.68k.org/"><filename>libaudiofile</filename></ulink>.
        </para>
      </section>

      <section id="faad_decoder">
        <title><varname>faad</varname></title>

        <para>
          Decodes AAC files using <ulink
          url="http://www.audiocoding.com/"><filename>libfaad</filename></ulink>.
        </para>
      </section>

      <section id="ffmpeg_decoder">
        <title><varname>ffmpeg</varname></title>

        <para>
          Decodes various codecs using <ulink
          url="https://ffmpeg.org/"><application>FFmpeg</application></ulink>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>analyzeduration</varname>
                  <parameter>VALUE</parameter>
                </entry>
                <entry>
                  Sets the FFmpeg muxer option
                  <varname>analyzeduration</varname>, which specifies
                  how many microseconds are analyzed to probe the
                  input.  The <ulink
                  url="https://ffmpeg.org/ffmpeg-formats.html">FFmpeg
                  formats documentation</ulink> has more information.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>probesize</varname>
                  <parameter>VALUE</parameter>
                </entry>
                <entry>
                  Sets the FFmpeg muxer option
                  <varname>probesize</varname>, which specifies
                  probing size in bytes, i.e. the size of the data to
                  analyze to get stream information.  The <ulink
                  url="https://ffmpeg.org/ffmpeg-formats.html">FFmpeg
                  formats documentation</ulink> has more information.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="flac_decoder">
        <title><varname>flac</varname></title>

        <para>
          Decodes FLAC files using
          <ulink url="https://xiph.org/flac/"><application>libFLAC</application></ulink>.
        </para>
      </section>

      <section id="dsdiff_decoder">
        <title><varname>dsdiff</varname></title>

        <para>
          Decodes DFF files containing DSDIFF data (e.g. SACD rips).
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>lsbitfirst</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  Decode the least significant bit first.  Default is
                  <parameter>no</parameter>.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="dsf_decoder">
        <title><varname>dsf</varname></title>

        <para>
          Decodes DSF files containing DSDIFF data (e.g. SACD rips).
        </para>

      </section>

      <section>
        <title><varname>fluidsynth</varname></title>

        <para>
          MIDI decoder based on <ulink
          url="http://www.fluidsynth.org/"><application>FluidSynth</application></ulink>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>sample_rate</varname>
                </entry>
                <entry>
                  The sample rate that shall be synthesized by the
                  plugin.  Defaults to 48000.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>soundfont</varname>
                </entry>
                <entry>
                  The absolute path of the soundfont file.  Defaults
                  to
                  <filename>/usr/share/sounds/sf2/FluidR3_GM.sf2</filename>.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>gme</varname></title>

        <para>
          Video game music file emulator based on <ulink
          url="https://bitbucket.org/mpyne/game-music-emu/wiki/Home"><application>game-music-emu</application></ulink>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>accuracy</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  Enable more accurate sound emulation.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="mad_decoder">
        <title><varname>mad</varname></title>

        <para>
          Decodes MP3 files using <ulink
          url="http://www.underbit.com/products/mad/"><application>libmad</application></ulink>.
        </para>
      </section>

      <section>
        <title><varname>mikmod</varname></title>

        <para>
          Module player based on <ulink
          url="http://mikmod.sourceforge.net/"><application>MikMod</application></ulink>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>loop</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  Allow backward loops in modules.  Default is
		  <parameter>no</parameter>.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>sample_rate</varname>
                </entry>
                <entry>
                  Sets the sample rate generated by
                  <filename>libmikmod</filename>.  Default is 44100.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>modplug</varname></title>

        <para>
          Module player based on <application>MODPlug</application>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>loop_count</varname>
                </entry>
                <entry>
                  Number of times to loop the module if it uses backward loops.
                  Default is <parameter>0</parameter> which prevents looping.
                  <parameter>-1</parameter> loops forever.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="mpcdec_decoder">
        <title><varname>mpcdec</varname></title>

        <para>
          Decodes Musepack files using <ulink
          url="http://www.musepack.net/"><application>libmpcdec</application></ulink>.
        </para>
      </section>

      <section id="mpg123_decoder">
        <title><varname>mpg123</varname></title>

        <para>
          Decodes MP3 files using <ulink
          url="http://www.mpg123.de/"><application>libmpg123</application></ulink>.
        </para>
      </section>

      <section id="opus_decoder">
        <title><varname>opus</varname></title>

        <para>
          Decodes Opus files using <ulink
          url="http://www.opus-codec.org/"><application>libopus</application></ulink>.
        </para>
      </section>

      <section>
        <title><varname>pcm</varname></title>

        <para>
          Read raw PCM samples.  It understands the "audio/L16" MIME
          type with parameters "rate" and "channels" according to RFC
          2586.  It also understands the
          <application>MPD</application>-specific MIME type
          "audio/x-mpd-float".
        </para>
      </section>

      <section id="sidplay_decoder">
        <title><varname>sidplay</varname></title>

        <para>
          C64 SID decoder based on <ulink
          url="http://sidplay2.sourceforge.net/"><application>libsidplay</application></ulink>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>songlength_database</varname>
                  <parameter>PATH</parameter>
                </entry>
                <entry>
                  Location of your songlengths file, as distributed
                  with the HVSC.  The <varname>sidplay</varname>
                  plugin checks this for matching MD5 fingerprints.
                  See <ulink url="http://www.hvsc.c64.org/download/C64Music/DOCUMENTS/Songlengths.faq"/>.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>default_songlength</varname>
                  <parameter>SECONDS</parameter>
                </entry>
                <entry>
                  This is the default playing time in seconds for
                  songs not in the songlength database, or in case
                  you're not using a database.  A value of 0 means
                  play indefinitely.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>filter</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  Turns the SID filter emulation on or off.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="sndfile_decoder">
        <title><varname>sndfile</varname></title>

        <para>
          Decodes WAV and AIFF files using <ulink
          url="http://www.mega-nerd.com/libsndfile/"><filename>libsndfile</filename></ulink>.
        </para>
      </section>

      <section id="vorbis_decoder">
        <title><varname>vorbis</varname></title>

        <para>
          Decodes Ogg-Vorbis files using <ulink
          url="http://www.xiph.org/ogg/vorbis/"><application>libvorbis</application></ulink>.
        </para>
      </section>

      <section id="wavpack_decoder">
        <title><varname>wavpack</varname></title>

        <para>
          Decodes WavPack files using
          <ulink url="http://www.wavpack.com/"><application>libwavpack</application></ulink>.
        </para>
      </section>

      <section>
        <title><varname>wildmidi</varname></title>

        <para>
          MIDI decoder based on <ulink
          url="http://www.mindwerks.net/projects/wildmidi/"><application>libwildmidi</application></ulink>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>config_file</varname>
                </entry>
                <entry>
                  The absolute path of the timidity config file.  Defaults
                  to
                  <filename>/etc/timidity/timidity.cfg</filename>.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>
    </section>

    <section id="encoder_plugins">
      <title>Encoder plugins</title>

      <section>
        <title><varname>flac</varname></title>

        <para>
          Encodes into <ulink
          url="https://xiph.org/flac/">FLAC</ulink> (lossless).
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>compression</varname>
                </entry>
                <entry>
                  Sets the <filename>libFLAC</filename> compression
                  level.  The levels range from 0 (fastest, least
                  compression) to 8 (slowest, most compression).
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>lame</varname></title>

        <para>
          Encodes into MP3 using the <ulink
          url="http://lame.sourceforge.net/"><application>LAME</application></ulink>
          library.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>quality</varname>
                </entry>
                <entry>
                  Sets the quality for VBR.  0 is the highest quality,
                  9 is the lowest quality.  Cannot be used with
                  <varname>bitrate</varname>.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>bitrate</varname>
                </entry>
                <entry>
                  Sets the bit rate in kilobit per second.  Cannot be
                  used with <varname>quality</varname>.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>null</varname></title>

        <para>
          Does not encode anything, passes the input PCM data as-is.
        </para>
      </section>

      <section>
        <title><varname>shine</varname></title>

        <para>
          Encodes into MP3 using the <ulink
          url="https://github.com/savonet/shine"><application>Shine</application></ulink>
          library.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>bitrate</varname>
                </entry>
                <entry>
                  Sets the bit rate in kilobit per second.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>twolame</varname></title>

        <para>
          Encodes into MP2 using the <ulink
          url="http://www.twolame.org/"><application>TwoLAME</application></ulink>
          library.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>quality</varname>
                </entry>
                <entry>
                  Sets the quality for VBR.  0 is the highest quality,
                  9 is the lowest quality.  Cannot be used with
                  <varname>bitrate</varname>.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>bitrate</varname>
                </entry>
                <entry>
                  Sets the bit rate in kilobit per second.  Cannot be
                  used with <varname>quality</varname>.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="opus_encoder">
        <title><varname>opus</varname></title>

        <para>
          Encodes into <ulink
          url="http://www.opus-codec.org/">Ogg Opus</ulink>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>bitrate</varname>
                </entry>
                <entry>
                  Sets the data rate in bit per second.  The special
                  value "auto" lets <application>libopus</application>
                  choose a rate (which is the default), and "max" uses
                  the maximum possible data rate.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>complexity</varname>
                </entry>
                <entry>
                  Sets the <ulink
                  url="https://wiki.xiph.org/OpusFAQ#What_is_the_complexity_of_Opus.3F">Opus
                  complexity</ulink>.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>signal</varname>
                </entry>
                <entry>
                  Sets the Opus signal type.  Valid values are "auto"
                  (the default), "voice" and "music".
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="vorbis_encoder">
        <title><varname>vorbis</varname></title>

        <para>
          Encodes into <ulink url="http://www.vorbis.com/">Ogg
          Vorbis</ulink>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>quality</varname>
                </entry>
                <entry>
                  Sets the quality for VBR.  -1 is the lowest quality,
                  10 is the highest quality.  Defaults to 3.  Cannot
                  be used with <varname>bitrate</varname>.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>bitrate</varname>
                </entry>
                <entry>
                  Sets the bit rate in kilobit per second.  Cannot be
                  used with <varname>quality</varname>.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>wave</varname></title>

        <para>
          Encodes into WAV (lossless).
        </para>
      </section>
    </section>

    <section id="resampler_plugins">
      <title>Resampler plugins</title>

      <para>
        The resampler can be configured in a block named
        <varname>resampler</varname>, for example:
      </para>

      <programlisting>resampler {
  plugin "soxr"
  quality "very high"
}</programlisting>

      <para>
        The following table lists the <varname>resampler</varname>
        options valid for all plugins:
      </para>

      <informaltable>
        <tgroup cols="2">
          <thead>
            <row>
              <entry>
                Name
              </entry>
              <entry>
                Description
              </entry>
            </row>
          </thead>
          <tbody>
            <row>
              <entry>
                <varname>plugin</varname>
              </entry>
              <entry>
                The name of the plugin.
              </entry>
            </row>
          </tbody>
        </tgroup>
      </informaltable>

      <section id="internal_resampler">
        <title><varname>internal</varname></title>

        <para>
          A resampler built into <application>MPD</application>.  Its
          quality is very poor, but its CPU usage is low.  This is the
          fallback if <application>MPD</application> was compiled
          without an external resampler.
        </para>
      </section>

      <section id="libsamplerate_resampler">
        <title><varname>libsamplerate</varname></title>

        <para>
          A resampler using <ulink
          url="http://www.mega-nerd.com/SRC/"><application>libsamplerate</application></ulink>
          a.k.a. Secret Rabbit Code (SRC).
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>
                  Name
                </entry>
                <entry>
                  Description
                </entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>type</varname>
                </entry>
                <entry>
                  The interpolator type.  See below for a list of
                  known types.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>

        <para>
          The following converter types are provided by
          <application>libsamplerate</application>:
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>
                  Type
                </entry>
                <entry>
                  Description
                </entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  "<parameter>Best Sinc Interpolator</parameter>" or
                  "<parameter>0</parameter>"
                </entry>
                <entry>
                  Band limited sinc interpolation, best quality, 97dB
                  SNR, 96% BW.
                </entry>
              </row>

              <row>
                <entry>
                  "<parameter>Medium Sinc Interpolator</parameter>" or
                  "<parameter>1</parameter>"
                </entry>
                <entry>
                  Band limited sinc interpolation, medium quality,
                  97dB SNR, 90% BW.
                </entry>
              </row>

              <row>
                <entry>
                  "<parameter>Fastest Sinc Interpolator</parameter>" or
                  "<parameter>2</parameter>"
                </entry>
                <entry>
                  Band limited sinc interpolation, fastest, 97dB SNR,
                  80% BW.
                </entry>
              </row>

              <row>
                <entry>
                  "<parameter>ZOH Sinc Interpolator</parameter>" or
                  "<parameter>3</parameter>"
                </entry>
                <entry>
                  Zero order hold interpolator, very fast, very poor
                  quality with audible distortions.
                </entry>
              </row>

              <row>
                <entry>
                  "<parameter>Linear Interpolator</parameter>" or
                  "<parameter>4</parameter>"
                </entry>
                <entry>
                  Linear interpolator, very fast, poor quality.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="soxr_resampler">
        <title><varname>soxr</varname></title>

        <para>
          A resampler using <ulink
          url="http://sourceforge.net/projects/soxr/"><application>libsoxr</application></ulink>,
          the SoX Resampler library
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>
                  Name
                </entry>
                <entry>
                  Description
                </entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>quality</varname>
                </entry>
                <entry>
                  The <application>libsoxr</application> quality
                  setting.  Valid values are:

                  <itemizedlist>
                    <listitem>
                      <para>
                        "<parameter>very high</parameter>"
                      </para>
                    </listitem>

                    <listitem>
                      <para>
                        "<parameter>high</parameter>" (the default)
                      </para>
                    </listitem>

                    <listitem>
                      <para>
                        "<parameter>medium</parameter>"
                      </para>
                    </listitem>

                    <listitem>
                      <para>
                        "<parameter>low</parameter>"
                      </para>
                    </listitem>

                    <listitem>
                      <para>
                        "<parameter>quick</parameter>"
                      </para>
                    </listitem>
                  </itemizedlist>
                </entry>
              </row>

              <row>
                <entry>
                  <varname>threads</varname>
                </entry>
                <entry>
                  The number of <application>libsoxr</application>
                  threads.  "0" means "automatic".  The default is "1"
                  which disables multi-threading.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>
    </section>

    <section id="output_plugins">
      <title>Output plugins</title>

      <section id="alsa_output">
        <title><varname>alsa</varname></title>

        <para>
          The <ulink
          url="http://www.alsa-project.org/"><application>Advanced
          Linux Sound Architecture</application>
          (<application>ALSA</application>)</ulink> plugin uses
          <filename>libasound</filename>.  It is recommended if you
          are using Linux.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>device</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  Sets the device which should be used.  This can be
                  any valid ALSA device name.  The default value is
                  "default", which makes
                  <filename>libasound</filename> choose a device.  It
                  is recommended to use a "hw" or "plughw" device,
                  because otherwise, <filename>libasound</filename>
                  automatically enables "dmix", which has major
                  disadvantages (fixed sample rate, poor resampler,
                  ...).
                </entry>
              </row>
              <row>
                <entry>
                  <varname>buffer_time</varname>
                  <parameter>US</parameter>
                </entry>
                <entry>
                  Sets the device's buffer time in microseconds.
                  Don't change unless you know what you're doing.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>period_time</varname>
                  <parameter>US</parameter>
                </entry>
                <entry>
                  Sets the device's period time in microseconds.
                  Don't change unless you really know what you're
                  doing.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>auto_resample</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  If set to <parameter>no</parameter>, then
                  <filename>libasound</filename> will not attempt to
                  resample, handing the responsibility over to
                  <application>MPD</application>.  It is recommended
                  to let <application>MPD</application> resample (with
                  <application>libsamplerate</application>), because
                  ALSA is quite poor at doing so.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>auto_channels</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  If set to <parameter>no</parameter>, then
                  <filename>libasound</filename> will not attempt to
                  convert between different channel numbers.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>auto_format</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  If set to <parameter>no</parameter>, then
                  <filename>libasound</filename> will not attempt to
                  convert between different sample formats (16 bit, 24
                  bit, floating point, ...).
                </entry>
              </row>
              <row>
                <entry>
                  <varname>dop</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  If set to <parameter>yes</parameter>, then DSD over
                  PCM according to the <ulink
                  url="http://dsd-guide.com/dop-open-standard">DoP
                  standard</ulink> is enabled.  This wraps DSD
                  samples in fake 24 bit PCM, and is understood by
                  some DSD capable products, but may be harmful to
                  other hardware.  Therefore, the default is
                  <parameter>no</parameter> and you can enable the
                  option at your own risk.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>allowed_formats</varname>
                  <parameter>F1 F2 ...</parameter>
                </entry>
                <entry>
                  <para>
                    Specifies a list of allowed audio formats, separated
                    by a space.  All items may contain asterisks as a
                    wild card, and may be followed by
                    "<parameter>=dop</parameter>" to enable DoP (DSD
                    over PCM) for this particular format.  The first
                    matching format is used, and if none matches, MPD
                    chooses the best fallback of this list.
                  </para>
                  <para>
                    Example: "<parameter>96000:16:* 192000:24:*
                    dsd64:*=dop *:dsd:*</parameter>".
                  </para>
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>

        <para>
          The according hardware mixer plugin understands the
          following settings:
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>mixer_device</varname>
                  <parameter>DEVICE</parameter>
                </entry>
                <entry>
                  <para>
                    Sets the ALSA mixer device name, defaulting to
                    <parameter>default</parameter> which lets ALSA
                    pick a value.
                  </para>
                </entry>
              </row>
              <row>
                <entry>
                  <varname>mixer_control</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  <para>
                    Choose a mixer control, defaulting to
                    <parameter>PCM</parameter>.  Type <command>amixer
                    scontrols</command> to get a list of available
                    mixer controls.
                  </para>
                </entry>
              </row>
              <row>
                <entry>
                  <varname>mixer_index</varname>
                  <parameter>NUMBER</parameter>
                </entry>
                <entry>
                  Choose a mixer control index.  This is necessary if
                  there is more than one control with the same name.
                  Defaults to <parameter>0</parameter> (the first
                  one).
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>ao</varname></title>

        <para>
          The <varname>ao</varname> plugin uses the portable <ulink
          url="https://www.xiph.org/ao/"><filename>libao</filename></ulink>
          library.  Use only if there is no native plugin for your
          operating system.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>driver</varname>
                  <parameter>D</parameter>
                </entry>
                <entry>
                  The <filename>libao</filename> driver to use for
                  audio output.  Possible values depend on what libao
                  drivers are available.  See <ulink
                  url="http://www.xiph.org/ao/doc/drivers.html">http://www.xiph.org/ao/doc/drivers.html</ulink>
                  for information on some commonly used drivers.
                  Typical values for Linux include "oss" and "alsa09".
                  The default is "default", which causes libao to
                  select an appropriate plugin.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>options</varname>
                  <parameter>O</parameter>
                </entry>
                <entry>
                  Options to pass to the selected
                  <filename>libao</filename> driver.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>write_size</varname>
                  <parameter>O</parameter>
                </entry>
                <entry>
                  This specifies how many bytes to write to the audio
                  device at once.  This parameter is to work around a
                  bug in older versions of libao on sound cards with
                  very small buffers.  The default is 1024.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>sndio</varname></title>

        <para>
          The <varname>sndio</varname> plugin uses the <ulink
          url="http://www.sndio.org/">sndio</ulink> library.  It should normally be used
          on OpenBSD.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>device</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  The audio output device <filename>libsndio</filename>
                  will attempt to use.  The default is "default" which
                  causes libsndio to select the first output device.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>buffer_time</varname>
                  <parameter>MS</parameter>
                </entry>
                <entry>
                  Set the application buffer time in milliseconds.
                </entry>
              </row>

            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>fifo</varname></title>

        <para>
          The <varname>fifo</varname> plugin writes raw PCM data to a
          FIFO (First In, First Out) file.  The data can be read by
          another program.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>path</varname>
                  <parameter>P</parameter>
                </entry>
                <entry>
                  This specifies the path of the FIFO to write to.
                  Must be an absolute path.  If the path does not
                  exist, it will be created when
                  <application>MPD</application> is started, and
                  removed when <application>MPD</application> is
                  stopped.  The FIFO will be created with the same
                  user and group as <application>MPD</application> is
                  running as.  Default permissions can be modified by
                  using the builtin shell command
                  <filename>umask</filename>.  If a FIFO already
                  exists at the specified path it will be reused, and
                  will not be removed when
                  <application>MPD</application> is stopped.  You can
                  use the "mkfifo" command to create this, and then
                  you may modify the permissions to your liking.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="jack_output">
        <title><varname>jack</varname></title>

        <para>
          The <varname>jack</varname> plugin connects to a <ulink
          url="http://jackaudio.org/"><application>JACK</application></ulink>
          server.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>client_name</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  The name of the <application>JACK</application>
                  client.  Defaults to "Music Player Daemon".
                </entry>
              </row>
              <row>
                <entry>
                  <varname>server_name</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  Optional name of the <application>JACK</application>
                  server.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>autostart</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  If set to <parameter>yes</parameter>, then
                  <filename>libjack</filename> will automatically
                  launch the <application>JACK</application> daemon.
                  Disabled by default.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>source_ports</varname>
                  <parameter>A,B</parameter>
                </entry>
                <entry>
                  The names of the <application>JACK</application>
                  source ports to be created.  By default, the ports
                  "left" and "right" are created.  To use more ports,
                  you have to tweak this option.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>destination_ports</varname>
                  <parameter>A,B</parameter>
                </entry>
                <entry>
                  The names of the <application>JACK</application>
                  destination ports to connect to.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>ringbuffer_size</varname>
                  <parameter>NBYTES</parameter>
                </entry>
                <entry>
                  Sets the size of the ring buffer for each channel.
                  Do not configure this value unless you know what
                  you're doing.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="httpd_output">
        <title><varname>httpd</varname></title>

        <para>
          The <varname>httpd</varname> plugin creates a HTTP server,
          similar to <ulink
          url="http://www.shoutcast.com/"><application>ShoutCast</application></ulink>
          / <ulink
          url="http://icecast.org/"><application>IceCast</application></ulink>.
          HTTP streaming clients like
          <application>mplayer</application>, <application>VLC</application>,
          and <application>mpv</application> can connect to it.
        </para>

        <para>
          It is highly recommended to configure a fixed
          <varname>format</varname>, because a stream cannot switch
          its audio format on-the-fly when the song changes.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>port</varname>
                  <parameter>P</parameter>
                </entry>
                <entry>
                  Binds the HTTP server to the specified port.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>bind_to_address</varname>
                  <parameter>ADDR</parameter>
                </entry>
                <entry>
                  Binds the HTTP server to the specified address (IPv4 or
                  IPv6). Multiple addresses in parallel are not supported.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>encoder</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  Chooses an encoder plugin.  A list of encoder
                  plugins can be found in the <link
                  linkend="encoder_plugins">encoder plugin
                  reference</link>.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>max_clients</varname>
                  <parameter>MC</parameter>
                </entry>
                <entry>
                  Sets a limit, number of concurrent clients. When set
                  to 0 no limit will apply.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>null</varname></title>

        <para>
          The <varname>null</varname> plugin does nothing.  It
          discards everything sent to it.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>sync</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  If set to <parameter>no</parameter>, then the timer
                  is disabled - the device will accept PCM chunks at
                  arbitrary rate (useful for benchmarking).  The
                  default behaviour is to play in real time.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="oss_output">
        <title><varname>oss</varname></title>

        <para>
          The "Open Sound System" plugin is supported on most Unix
          platforms.
        </para>

        <para>
          On Linux, <application>OSS</application> has been superseded
          by <application>ALSA</application>.  Use the <link
          linkend="alsa_output"><application>ALSA</application> output
          plugin</link> instead of this one on Linux.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>device</varname>
                  <parameter>PATH</parameter>
                </entry>
                <entry>
                  Sets the path of the PCM device.  If not specified,
                  then <application>MPD</application> will attempt to
                  open <filename>/dev/sound/dsp</filename> and
                  <filename>/dev/dsp</filename>.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>

        <para>
          The according hardware mixer plugin understands the
          following settings:
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>mixer_device</varname>
                  <parameter>DEVICE</parameter>
                </entry>
                <entry>
                  <para>
                    Sets the OSS mixer device path, defaulting to
                    <filename>/dev/mixer</filename>.
                  </para>
                </entry>
              </row>
              <row>
                <entry>
                  <varname>mixer_control</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  <para>
                    Choose a mixer control, defaulting to
                    <parameter>PCM</parameter>.
                  </para>
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="openal_output">
        <title><varname>openal</varname></title>

        <para>
          The "OpenAL" plugin uses <ulink
          url="http://kcat.strangesoft.net/openal.html"><filename>libopenal</filename></ulink>.
          It is supported on many platforms.  Use only if there is no
          native plugin for your operating system.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>device</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  Sets the device which should be used.  This can be
                  any valid OpenAL device name. If not specified, then
                  <filename>libopenal</filename> will choose a default device.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>osx</varname></title>

        <para>
          The "Mac OS X" plugin uses Apple's CoreAudio API.
        </para>
        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>device</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  Sets the device which should be used. Uses device names as listed in the
                  "Audio Devices" window of "Audio MIDI Setup".
                </entry>
              </row>
              <row>
                <entry>
                  <varname>hog_device</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  Hog the device. This means that it takes exclusive control of the audio
                  output device it is playing through, and no other program can access it.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>sync_sample_rate</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  Synchronize the sample rate. It will try to set the output device sample
                  rate to the corresponding sample rate of the file playing. If the output
                  device does not support the sample rate the track has, it will try to 
                  select the best possible for each file.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>channel_map</varname>
                  <parameter>SOURCE,SOURCE,...</parameter>
                </entry>
                <entry><para>
                    Specifies a channel map. If your audio device has more than two
                    outputs this allows you to route audio to auxillary outputs. For
                    predictable results you should also specify a "format" with a fixed
                    number of channels, e.g. "*:*:2". The number of items in the channel
                    map must match the number of output channels of your output device.
                    Each list entry specifies the source for that output channel; use "-1"
                    to silence an output. For example, if you have a four-channel output
                    device and you wish to send stereo sound (format "*:*:2") to outputs 3
                    and 4 while leaving outputs 1 and 2 silent then set the channel map to
                    "-1,-1,0,1". In this example '0' and '1' denote the left and right
                    channel respectively.
                  </para>
                  <para>
                    The channel map may not refer to outputs that do not exist according
                    to the format. If the format is "*:*:1" (mono) and you have a
                    four-channel sound card then "-1,-1,0,0" (dual mono output on the
                    second pair of sound card outputs) is a valid channel map but
                    "-1,-1,0,1" is not because the second channel ('1') does not exist
                    when the output is mono.
                </para></entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>pipe</varname></title>

        <para>
          The <varname>pipe</varname> plugin starts a program and
          writes raw PCM data into its standard input.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>command</varname>
                  <parameter>CMD</parameter>
                </entry>
                <entry>
                  This command is invoked with the shell.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="pulse_output">
        <title><varname>pulse</varname></title>

        <para>
          The <varname>pulse</varname> plugin connects to a <ulink
          url="http://www.freedesktop.org/wiki/Software/PulseAudio/"><application>PulseAudio</application></ulink>
          server.  Requires <filename>libpulse</filename>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>server</varname>
                  <parameter>HOSTNAME</parameter>
                </entry>
                <entry>
                  Sets the host name of the
                  <application>PulseAudio</application> server.  By
                  default, <application>MPD</application> connects to
                  the local <application>PulseAudio</application>
                  server.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>sink</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  Specifies the name of the
                  <application>PulseAudio</application> sink
                  <application>MPD</application> should play on.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>roar</varname></title>

        <para>
          The <varname>roar</varname> plugin connects to a <ulink
          url="http://roaraudio.keep-cool.org/">RoarAudio</ulink>
          server.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>server</varname>
                  <parameter>HOSTNAME</parameter>
                </entry>
                <entry>
                  The host name of the RoarAudio server.  If not
                  specified, then <application>MPD</application> will
                  connect to the default locations.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>role</varname>
                  <parameter>ROLE</parameter>
                </entry>
                <entry>
                  The "role" that <application>MPD</application>
                  registers itself as in the RoarAudio server.  The
                  default is "music".
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>recorder</varname></title>

        <para>
          The <varname>recorder</varname> plugin writes the audio
          played by <application>MPD</application> to a file.  This
          may be useful for recording radio streams.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>path</varname>
                  <parameter>P</parameter>
                </entry>
                <entry>
                  Write to this file.
                </entry>
              </row>

              <row>
                <entry>
                  <varname>format_path</varname>
                  <parameter>P</parameter>
                </entry>
                <entry>
                  <para>
                    An alternative to <varname>path</varname> which
                    provides a format string referring to tag values.

                    The special tag <varname>iso8601</varname> emits
                    the current date and time in <ulink
                    url="https://en.wikipedia.org/wiki/ISO_8601">ISO8601</ulink>
                    format (UTC).
                    Every time a new song starts or a new tag gets
                    received from a radio station, a new file is
                    opened.  If the format does not render a file
                    name, nothing is recorded.
                  </para>

                  <para>
                    A tag name enclosed in percent signs ('%') is
                    replaced with the tag value.  Example:
                    <parameter>~/.mpd/recorder/%artist% -
                    %title%.ogg</parameter>
                  </para>

                  <para>
                    Square brackets can be used to group a substring.
                    If none of the tags referred in the group can be
                    found, the whole group is omitted.  Example:
                    <parameter>[~/.mpd/recorder/[%artist% -
                    ]%title%.ogg]</parameter> (this omits the dash
                    when no artist tag exists; if title also doesn't
                    exist, no file is written)
                  </para>

                  <para>
                    The operators "|" (logical "or") and "&amp;"
                    (logical "and") can be used to select portions of
                    the format string depending on the existing tag
                    values.  Example:
                    <parameter>~/.mpd/recorder/[%title%|%name%].ogg</parameter>
                    (use the "name" tag if no title exists)
                  </para>
                </entry>
              </row>

              <row>
                <entry>
                  <varname>encoder</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  Chooses an encoder plugin.  A list of encoder
                  plugins can be found in the <link
                  linkend="encoder_plugins">encoder plugin
                  reference</link>.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section id="shout_output">
        <title><varname>shout</varname></title>

        <para>
          The <varname>shout</varname> plugin connects to a <ulink
          url="http://www.shoutcast.com/"><application>ShoutCast</application></ulink>
          or <ulink
          url="http://icecast.org/"><application>IceCast</application></ulink>
          server using <filename>libshout</filename>.  It forwards
          tags to this server.
        </para>

        <para>
          You must set a <varname>format</varname>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>host</varname>
                  <parameter>HOSTNAME</parameter>
                </entry>
                <entry>
                  Sets the host name of the <ulink
                  url="http://www.shoutcast.com/"><application>ShoutCast</application></ulink>
                  / <ulink
                  url="http://icecast.org/"><application>IceCast</application></ulink>
                  server.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>port</varname>
                  <parameter>PORTNUMBER</parameter>
                </entry>
                <entry>
                  Connect to this port number on the specified host.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>timeout</varname>
                  <parameter>SECONDS</parameter>
                </entry>
                <entry>
                  Set the timeout for the shout connection in seconds.
                  Defaults to 2 seconds.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>protocol</varname>
                  <parameter>icecast2|icecast1|shoutcast</parameter>
                </entry>
                <entry>
                  Specifies the protocol that wil be used to connect
                  to the server.  The default is
                  "<parameter>icecast2</parameter>".

                </entry>
              </row>
              <row>
                <entry>
                  <varname>mount</varname>
                  <parameter>URI</parameter>
                </entry>
                <entry>
                  Mounts the <application>MPD</application> stream in
                  the specified URI.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>user</varname>
                  <parameter>USERNAME</parameter>
                </entry>
                <entry>
                  Sets the user name for submitting the stream to the
                  server.  Default is "source".
                </entry>
              </row>
              <row>
                <entry>
                  <varname>password</varname>
                  <parameter>PWD</parameter>
                </entry>
                <entry>
                  Sets the password for submitting the stream to the
                  server.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>name</varname>
                  <parameter>NAME</parameter>
                </entry>
                <entry>
                  Sets the name of the stream.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>genre</varname>
                  <parameter>GENRE</parameter>
                </entry>
                <entry>
                  Sets the genre of the stream (optional).
                </entry>
              </row>
              <row>
                <entry>
                  <varname>description</varname>
                  <parameter>DESCRIPTION</parameter>
                </entry>
                <entry>
                  Sets a short description of the stream (optional).
                </entry>
              </row>
              <row>
                <entry>
                  <varname>url</varname>
                  <parameter>URL</parameter>
                </entry>
                <entry>
                  Sets a URL associated with the stream (optional).
                </entry>
              </row>
              <row>
                <entry>
                  <varname>public</varname>
                  <parameter>yes|no</parameter>
                </entry>
                <entry>
                  Specifies whether the stream should be "public".
                  Default is <parameter>no</parameter>.
                </entry>
              </row>
              <row>
                <entry>
                  <varname>encoder</varname>
                  <parameter>PLUGIN</parameter>
                </entry>
                <entry>
                  Chooses an encoder plugin.  Default is <link
                  linkend="vorbis_encoder"><parameter>vorbis</parameter></link>.
                  A list of encoder plugins can be found in the <link
                  linkend="encoder_plugins">encoder plugin
                  reference</link>.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>solaris</varname></title>

        <para>
          The "Solaris" plugin runs only on SUN Solaris, and plays via
          <filename>/dev/audio</filename>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>device</varname>
                  <parameter>PATH</parameter>
                </entry>
                <entry>
                  Sets the path of the audio device, defaults to
                  <filename>/dev/audio</filename>.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>
    </section>

    <section id="playlist_plugins">
      <title>Playlist plugins</title>

      <section>
        <title><varname>asx</varname></title>

        <para>
          Reads <filename>.asx</filename> playlist files.
        </para>
      </section>

      <section>
        <title><varname>cue</varname></title>

        <para>
          Reads <filename>.cue</filename> files.
        </para>
      </section>

      <section>
        <title><varname>embcue</varname></title>

        <para>
          Reads CUE sheets from the "CUESHEET" tag of song files.
        </para>
      </section>

      <section>
        <title><varname>m3u</varname></title>

        <para>
          Reads <filename>.m3u</filename> playlist files.
        </para>
      </section>

      <section>
        <title><varname>extm3u</varname></title>

        <para>
          Reads extended <filename>.m3u</filename> playlist files.
        </para>
      </section>

      <section>
        <title><varname>flac</varname></title>

        <para>
          Reads the <varname>cuesheet</varname> metablock from a FLAC
          file.
        </para>
      </section>

      <section>
        <title><varname>pls</varname></title>

        <para>
          Reads <filename>.pls</filename> playlist files.
        </para>
      </section>

      <section>
        <title><varname>rss</varname></title>

        <para>
          Reads music links from <filename>.rss</filename> files.
        </para>
      </section>

      <section>
        <title><varname>soundcloud</varname></title>

        <para>
          Download playlist from SoundCloud.  It accepts URIs starting
          with <filename>soundcloud://</filename>.
        </para>

        <informaltable>
          <tgroup cols="2">
            <thead>
              <row>
                <entry>Setting</entry>
                <entry>Description</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry>
                  <varname>apikey</varname>
                  <parameter>KEY</parameter>
                </entry>
                <entry>
                  An API key to access the SoundCloud servers.
                </entry>
              </row>
            </tbody>
          </tgroup>
        </informaltable>
      </section>

      <section>
        <title><varname>xspf</varname></title>

        <para>
          Reads <ulink url="http://www.xspf.org/">XSPF</ulink>
          playlist files.
        </para>
      </section>
    </section>
  </chapter>
</book>

wiki | mailing list/newsgroup | bug tracker | request an account

Thanks to Alexander Wirt for providing git hosting for the Music Player Daemon project.