Better Linux Sound Management With ALSA - page 3
Webcams Win, Author LosesWhat if you have two sound devices? In alsamixer, hit F1. This displays basic commands. F2 displays various /proc/asound outputs related to sound all in one screen. Figure 3 shows I have two sound devices, 0 and 1. F1 takes you back to the menu, and the Return key closes it. To configure the second sound device, close alsamixer by hitting the Escape key, then reopen it like this:
$ alsamixer -c 1
-c means card number. A quick way to test your sound is with aplay:
$ aplay -d plug:dmix yoursoundfile.wav
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