Re: [Alsa-user] playing / recording mono on a stereo-only hardware

[Guennadi L. <g.l...@gm...>]

On Mon, 25 Jan 2010, Clemens Ladisch wrote:

> Guennadi Liakhovetski wrote:
> > Is there a way to tell alsa-lib to duplicate the mono-channel during
> > playback and to mix recorded channels, if mono recording is requested?
> 
> Yes, with the "plug" plugin.  It should be used automatically by the
> "default" and "plughw" devices.

Do I need any asoundrc for this or should this also happen without one? 
This "plug" plugin is built into the libasound? I was advised to use 
config like

pcm.!default {
        type plug
        slave {
                pcm "hw:0,0"
                channels 2
        }
        route_policy duplicate
}

but, unfortunately, it didn't help.

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/