[alsa-devel] How to apply rate conversion in asound.conf

[Dolevo Jay]

> From: cmst at live.com
> To: alsa-devel at alsa-project.org
> Date: Fri, 8 Nov 2013 14:15:30 +0000
> Subject: Re: [alsa-devel] How to apply rate conversion in asound.conf
> 
> 
> 
> 
> 
> > Date: Wed, 6 Nov 2013 17:30:25 +0100
> > From: clemens at ladisch.de
> > To: cmst at live.com; alsa-devel at alsa-project.org
> > Subject: Re: [alsa-devel] How to apply rate conversion in asound.conf
> > 
> > Dolevo Jay wrote:
> > > pcm.!default {
> > > 	type plug
> > > 	slave.pcm multi
> > > }
> > >
> > > pcm.multi {
> > >         slaves.a.pcm "hw:0,1";
> > >         slaves.b.pcm "hw:1,1";
> > > ...
> > >
> > > My purpose is to apply rate conversion to the "hw:1,1" and have 44100 rate
> > > out.
> > 
> > All slaves must use the same rate.
> > 
> > The easiest way is apply this to the plug plugin:
> > 
> > pcm.!default {
> > 	type plug
> > 	slave {
> > 		pcm multi
> > 		rate 44100
> > 	}
> > }
> > 
> > 
> > Regards,
> > Clemens
> > _______________________________________________
> > Alsa-devel mailing list
> > Alsa-devel at alsa-project.org
> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 
> Hi,
> 
> What you suggested worked perfect but I implemented the rate conversion in my software for some specific reasons.
> What I need to do now is to have a aosund.conf which has dmix into multi plugins together. 
> So, here is my multi configuration:
> --------------------------------
> pcm.!default {
> 	type plug
> 	slave.pcm multi
> }
>  
> pcm.multi {
>         type multi;
>         slaves.a.pcm "hw:0,1";
>         slaves.a.channels 2;
>         slaves.b.pcm "hw:1,1";
>         slaves.b.channels 2;
>  
>         bindings.0.slave a;
>         bindings.0.channel 0;
>         bindings.1.slave a;
>         bindings.1.channel 1;
>         bindings.2.slave b;
>         bindings.2.channel 0;
>         bindings.3.slave b;
>         bindings.3.channel 1;
> }
> 
> --------------------------------
> The following dmix runs ok for 1,1 hardware:
> --------------------------------
> pcm.dmixer {
>     type dmix
>     ipc_key 2048
>     slave {
>         pcm "hw:1,1"
>     }
>     bindings {
>         0 0
>         1 1
>     }
> }
> 
> pcm.!default {
>     type plug
>     slave.pcm dmixer
> }
> --------------------------------
> 
> Could you please tell me how I can implement the second configuration with dmixer into the first one which has multi. 
> So, basically how can I call a plugin inside of another plugin?
> 
> Thanks a lot.
> 
>  		 	   		   		 	   		  
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> Alsa-devel at alsa-project.org
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Hello,

I'd appreciate if someone could tell me even this is possible or not?

Thanks.