If you want to test if your speaker channels are working properly under Ubuntu, then try the Linux command given below. This command works only with ALSA sound drivers installed for your sound card.

To test speaker channels under Ubuntu, launch the Terminal and issue this command:

 speaker-test -D plug:surround51 -c 6 -l 1 -t wav

You will hear a sound coming from your different speaker channels (Front Left, Center, Front Right, Rear Left). Here is a sample of the output you may get:

~$ speaker-test -D plug:surround51 -c 6 -l 1 -t wav


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 349504
Period size range from 32 to 174752
Using max buffer size 349504
Periods = 4
was set period_size = 174752
was set buffer_size = 349504
 0 - Front Left
 4 - Center
 1 - Front Right
 3 - Rear Right
 2 - Rear Left
^[[D^[[D^[[C 5 - LFE
Time per period = 21.901517

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