[pulseaudio-discuss] Splitting a sound card

Lennart Poettering lennart at poettering.net
Mon Sep 3 12:17:01 PDT 2007

On Wed, 29.08.07 12:52, Jan Kasprzak (kas at fi.muni.cz) wrote:


> I have read the FAQ, where it is described how to join several sound cards
> into one output. What I would like to do is the opposite:
> I have a 4-channel sound card, and I would like to use it as two
> independent sinks, with two channels each (for example, one for the
> speakers, and the second one for the headphones). I want (for
> example) ekiga to send an "incoming call ringtone" to both outlets,
> while the rest of the call should go to the headphone outlet only.
> Can you help me with this setup, preferably by posting a sample
> configuration? I thought about loading module-alsa-sink twice, each
> time with different parameters (maybe channel_map?).

You may not practically do this with PA right now. I have added this to my
TODO list now. Should be a fairly simple to implement. Stay tuned.


Lennart Poettering                        Red Hat, Inc.
lennart [at] poettering [dot] net         ICQ# 11060553
http://0pointer.net/lennart/           GnuPG 0x1A015CC4

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