At Thu, 14 Feb 2013 23:09:45 +0100,
Clemens Ladisch wrote:
>
> Sheldon Hearn wrote:
> > I gutted /usr/share/alsa/alsa.conf so that it just loads
> > /etc/asound.conf
>
> Aaargh!
>
> That file contains all the default definitions.
> Please restore the original from the alsa-lib package.
>
> > Is there a way I can get debugging output from ALSA while it processes
> > its configuration, so that I can try to make sense of this?
>
> Unfortunately not.
True... Maybe printing the configuration item in question would be
helpful. (Oh wait, do we have a function to print a config item at
all?)
> > pcm.multi {
> > type multi;
> > slaves.a.pcm "hw:0,0";
> > [...]
> > }
> >
> > pcm.multi {
> > type hw;
> > card 0;
> > }
> >
> > The second pcm.multi stanza redefines the device called multi using
> > the hw plugin. invalidating the configuration statements in the first
> > stanza.
>
> Actually, this _merges_ both definition; the result is the same as:
>
> pcm.multi {
> type hw
> slaves.a.pcm "hw:0,0"
> ...
> card 0
> }
Yes. If you want to redefine (override), you'll need to put "!"
prefix:
pcm.!multi {
....
}
Takashi
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