Re: [linux-audio-user] Patch one channel to both channels in ALSA?

From: Patrick Shirkey <pshirkey@email-addr-hidden>
Date: Sat Jan 06 2007 - 19:22:17 EET

Peter Clarke wrote:
> Is there a neat software solution for patching, say, the
> left channel of PCM output to both channels of the line
> output of my soundcard in ALSA?
>
> I need this because I've just installed a TV card, which
> works great except that the dual language function doesn't
> seem to be supported. So I get English in one speaker and
> Chinese in the other. I'd rather have the same in both.
>
> I thought of doing it with the JACK patchbay, but the TV
> output unfortunately doesn't show up in JACK.
>
> Thanks for any help,
>

-Firstly what app are you using? It could be that someone round here
uses it and knows of a work around.

- There once was a jack plugin for alsa which allows you to run alsa/oss
apps through jack

http://alsa-project.org/alsa-doc/doc-php/asoundrc.php?company=Generic&card=Generic&chip=Generic&module=Generic#jackplug

Apparently it doesn't work anymore.

- I thought there might be a plugin for assiging channels specifically
via an asoundrc file

http://alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html#pcm_plugins

Looking into this it appears there is not that feature. Probably because
no one has ever needed it.

I would say the easiest solution is to file a bug report with the person
who makes the TV software. However you might get lucky and someone round
here might feel like whipping up a new plugin to solve your problem...

Cheers.

-- 
Patrick Shirkey - Boost Hardware Ltd.
http://www.boosthardware.com
http://lau.linuxaudio.org - The Linux Audio Users guide
========================================
"Anything your mind can see you can manifest physically, then it will 
become reality" - Macka B
Received on Sat Jan 6 20:15:02 2007

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