Re: Creating a "software speakerphone" in ALSA

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On Sun, 7 Dec 2008 22:14:32 +0100
Jan-Benedict Glaw <jbglaw@xxxxxxxxxx> wrote:

> On Sun, 2008-12-07 22:31:26 +0200, Sergei Steshenko <steshenko_sergei@xxxxxxx> wrote:
> > On Sun, 7 Dec 2008 20:57:09 +0100, Jan-Benedict Glaw <jbglaw@xxxxxxxxxx> wrote:
> > > On Sun, 2008-12-07 12:23:53 +0000, Jim Higson <jh@xxxxxxx> wrote:
> > > > I don't have a landline so I talk a lot on Skype using my USB headset. This 
> > > > is great, but sometimes I want to put it on speaker, like when I'm on hold 
> > > > at my bank for a long time.
> > > 
> > > I have a similar setup (a number of sound cards, plus I want to feed a
> > > RTP stream to the network), which I use with Pulseaudio. So Pulseaudio
> > > is the switching matrix, using ALSA for low-level device access. This
> > > works quite nice, allowing eg. volume control per virtual channel,
> > > interruption-free (and transparent for the application) move from one
> > > sound input/output device to another, ...
> > 
> > I haven't used Pulseaudio; I think one will have to create a pseudo ALSA
> > device in Pulseaudio and point Skype to it.
> 
> I once used Skype. It doesn't have a really nice configurable sound
> connector at all, so the trick is to configure ALSA (via asoundrc) to
> (per default) use pulse:
> 
> pcm.!default {
> 	type pulse
> }
> ctl.!default {
> 	type pulse
> }
> 
> Skype will simply use the default device and thus use Pulse, which in
> turn will use the ALSA hardware driver to send/receive sounds to the
> two sound cards.

Modern Skype (2.0.0.72) does have a menu for devixes selection, and has a lot
of options. The menu can be accessed as S (lower left corner) -> Options ->
Sound Devices.

Well, since I do not know Pulseaudio, I cant say which way is better.

Regards,
  Sergei.

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