> Is it possible to make an pcm/ctl device in asoundrc file that would redirect 
> the
> output to the correct card/mixer depending on they existence? The algorithm 
> should
> look more or less like:
> 
> If "default" exist:
>       pcm.redir -> plughw:default
>       clt.redir -> default.Speaker
> Elsif Xmod exists:
>       pcm.redir -> plughw:Xmod
>       ctl.redir -> Xmod.PCM
> Else
>       pcm.redir -> default (underneath dmixed&dsnooped internal sound card)
>       ctl.redir -> card 0
> fi
> 
> Any idea how to write that in the asound file?

You could try writing three asoundrc files, one for each card, then
write a hotplug script which makes one of the asoundrc files the default
when it detects one of the cards being connected/disconnected.

The only problem with this is that I think all the ALSA configuration
(reading and parsing the config files) is done by each and every program
(presumably via alsa-lib.)  This means that after the config file
changes, you'll need to close and reopen any program using audio for the
change to take effect.

Cheers,
Adam.


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