audiocfg list
audiocfg default [index]
audiocfg test [index]
'list' shows the available audio devices, 'default' sets the default
audio device, and 'test' will play a tone for 2 seconds on each
channel. example:
$ ./audiocfg list
0: [*] audio0: ICH2 AC97 (2 playback channels)
1: [ ] audio1: Pseudo Audio (2 playback channels)
$ ./audiocfg test 0
testing channel 0...
testing channel 1...
$
