Re: Creating a "software speakerphone" in ALSA

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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.

So the basic point is that you'd like to have a switching matrix
between physical inputs/outputs and logical streams.

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, ...

MfG, JBG

-- 
      Jan-Benedict Glaw      jbglaw@xxxxxxxxxx              +49-172-7608481
 Signature of:                            If it doesn't work, force it.
 the second  :                   If it breaks, it needed replacing anyway.

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