[pulseaudio-discuss] Splitting a sound card

Tanu Kaskinen tanuk at iki.fi
Wed Aug 29 05:31:14 PDT 2007

On Wed, Aug 29, 2007 at 03:08:43PM +0300, Tanu Kaskinen wrote:
> You can load
> module-alsa-sink with only two channels, and with
> channel_map you could probably even control which channels
> go to which physical output. Then you would only need to
> load another instance of module-alsa-sink, but with
> different channels.

I have to correct myself. That configuration is wrong. This
is more like what might actually work (with a hw mixing
sound card, that is):

# The first stereo pair:
load-module module-alsa-sink sink_name=speakers channels=2 channel_map=left,right

# The second stereo pair, the random aux channels shift the
# real channels to the next physical output:
load-module module-alsa-sink sink_name=headphones channels=4 channel_map=aux14,aux15,left,right


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