Re: problems with the mixer

[Takashi Iwai <tiwai@suse.de>]

At Fri, 14 May 2004 20:05:09 +0200,
Aner Gusic wrote:
> 
> * Takashi Iwai <tiwai@suse.de>:
> 
> > you can use "front", "rear" and "surround40" PCMs.
> > then the volumes and the route should be initialized properly.
> 
> I've tryed playing some samples with aplay combined with -D parameter,
> e.g. "aplay -Dfront foo.wav".  However, what I want is to play a
> sample on both front and rear speakers, but control the sound level
> independently, so what remains is the surround40-pcm.
> 
> When I try this (-Dsurround40) I get the following message:
> aplay: set_params:837: Channels count non available
 
did you play a 4-channel sample file?

> I've tried reading documentation in alsa-driver source-tree, but it is
> sparse.  No documentation on the homepage that I found covers what I
> am having problems with. :/  Any suggestions to where I should look?
> Mostly, it should cover pcm:s, this "routing stuff" and such.

it's not the scope of the driver but the library.
you might find some useful info in ALSA wiki page...


Takashi


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