what exactly can the mixewr set?

[Erik Udo]

Jan Stary wrote:
> Hello,
> 
> I am using a SoundBlaster AWE64 via sound/snd_sbc/snd_sb16 under
> FreeBSD 5.4-RELEASE-p6. My mixer(8), when called without arguments,
> says
> 
> Mixer vol      is currently set to  80:80
> Mixer bass     is currently set to  90:90
> Mixer treble   is currently set to  94:94
> Mixer synth    is currently set to   0:0
> Mixer pcm      is currently set to  83:83
> Mixer speaker  is currently set to   0:0
> Mixer line     is currently set to   0:0
> Mixer mic      is currently set to   0:0
> Mixer cd       is currently set to   0:0
> Mixer igain    is currently set to   0:0
> Mixer ogain    is currently set to   0:0
> Mixer line1    is currently set to   0:0
> Recording source: mic
> 
> I can understand the obvious stuff, but what is
> igain, ogain and line1? Tweaking them during
> various playback/recording situations never
> seems to make any difference.
> 
> 	Thanks
> 
> 		Jan
> 
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My ogain works as a volume setting. Vol doesn't work but
pcm does.