Re: playing / recording mono on a stereo-only hardware

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On Sat, 30 Jan 2010 16:59:48 +0100 (CET)
Guennadi Liakhovetski <g.liakhovetski@xxxxxx> wrote:

> On Sat, 30 Jan 2010, Giuliano Pochini wrote:
> 
> > On Fri, 29 Jan 2010 11:44:43 +0100 (CET)
> > Guennadi Liakhovetski <g.liakhovetski@xxxxxx> wrote:
> > 
> > > > Try something simpler:
> > > > 
> > > > arecord -v -Dplughw:0 -c1 -r44100 -fS16_LE out.wav
> > > > 
> > > > It prints the given parameters and, if the format is not supported by the
> > > > card, it also prints the choosen settings. In that case audio data is
> > > > transparently converted to the format you requested.
> > > > You shouldn't have to specify plughw: because it's the default.
> > > 
> > > Unfortunately, didn't work:
> > 
> > Did you try with "-Dplughw:0" ?
> 
> Yes, I did, doesn't help.

Does the driver uses rules to set hw params constraints ?  If so, there may
be an error there. If -for example- rule_format_given_channels() and
rule_channels_given_format() are not perfectly symmetrical then the plughw
plugin does not work.


-- 
Giuliano.

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