Test speaker channels

speaker-test -D plug:surround51 -c 6 -l 1 -t wav
Useful tool to test if all speaker channels are working properly. speaker-test is part of alsa-utils package
Sample Output
speaker-test 1.0.21

Playback device is plug:surround51
Stream parameters are 48000Hz, S16_LE, 6 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 64 to 16384
Period size range from 32 to 8192
Using max buffer size 16384
Periods = 4
was set period_size = 4096
was set buffer_size = 16384
 0 - Front Left
 4 - Center
 1 - Front Right
 3 - Rear Right
 2 - Rear Left
 5 - LFE
Time per period = 8.363521

5
2009-11-05 02:57:46

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