[alsa-devel] [Q] playing / recording mono on a stereo-only hardware
Hi
I know this question belongs rather to alsa-users, and I did ask it there, but got no solution so far. Maybe someone here can help.
The recently posted SuperH SIU driver only supports stereo playback and capture (channels_min = channels_max = 2). Is there a way to tell alsa-lib to duplicate the mono-channel during playback and to mix recorded channels (or use one of them), if mono recording is requested?
Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/
Guennadi Liakhovetski wrote:
Hi
I know this question belongs rather to alsa-users, and I did ask it there, but got no solution so far. Maybe someone here can help.
The recently posted SuperH SIU driver only supports stereo playback and capture (channels_min = channels_max = 2). Is there a way to tell alsa-lib to duplicate the mono-channel during playback and to mix recorded channels (or use one of them), if mono recording is requested?
I'm not an expert but I think that you can use plughw support of alsa-lib
pcm.record { type plug slave { pcm record_hw } route_policy average rate_converter "linear" }
I think that automatically change rate and channel for supporting mono channel too
Michael
Thanks Guennadi
Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
On Sat, 30 Jan 2010, Michael Trimarchi wrote:
Guennadi Liakhovetski wrote:
Hi
I know this question belongs rather to alsa-users, and I did ask it there, but got no solution so far. Maybe someone here can help.
The recently posted SuperH SIU driver only supports stereo playback and capture (channels_min = channels_max = 2). Is there a way to tell alsa-lib to duplicate the mono-channel during playback and to mix recorded channels (or use one of them), if mono recording is requested?
I'm not an expert but I think that you can use plughw support of alsa-lib
pcm.record { type plug slave { pcm record_hw } route_policy average rate_converter "linear" }
I think that automatically change rate and channel for supporting mono channel too
Thanks for the snippet, but, I'm afraid, it didn't help either.
Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/
participants (2)
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Guennadi Liakhovetski -
Michael Trimarchi