[pulseaudio-discuss] Splitting a sound card

[Tanu Kaskinen]

On Wed, Aug 29, 2007 at 04:35:00PM +0200, Jan Kasprzak wrote:
> 	Ekiga can be set up to use the alternative sound device
> for ringtones (Edit -> Preferences -> General -> Sound events ->
> -> Alternative Output Device).

Ok. One more way of doing what you want with Ekiga popped to
my mind. You can do quite complex things in ~/.asoundrc. Too
bad the configuration language is totally incomprehensible
(with the documentation I've read, anyway;
http://alsa.opensrc.org/.asoundrc looks like it might
actually explain the concepts in acceptable detail and
clarity).

I assume you already have the pulse device defined in
/etc/asound.conf or ~/.asoundrc. In addition to that you
would make two stereo devices, that would pass their data to
appropriate channels in the 4-channel pulse device. If Ekiga
allows you to use both devices for the ringtone, this
suffices. If not, you'll need another stereo device that
copies the data to both the other stereo devices, that will
be the ringtone device.

Good luck. I can't give any more exact advice, I never
learned the alsa configuration language.

-- 
Tanu