radio testing, press to talk hack

[Jim Gettys]

Brian,

We've been thinking about switching over to base things on Pulseaudio at
some point.

Keep us posted.

I had a conversation at LCA with Lennart on the topic.

If it goes well for you, we'll see about interfacing CSound to use it.
                            - Jim


On Mon, 2007-03-26 at 12:49 -0700, Brian Cavagnolo wrote:
> Hello James,
> 
> > I've set up a script that lets me "press to talk" into the microphone
> > of a unit and have the sound come out the speakers of all the other
> > units in the mesh.  Sort of like how a radio transceiver works.
> 
> I'm working on a similar (okay, practically identical) application.
> The target is a mesh network very similar to the OLPC's.  The
> implementation depends on Pulse Audio, and is based on the RTP modules
> included therewith.  Pulse Audio handles all the mixing, so
> simultaneous talkers are supported.  I call the modules the PTT (i.e.,
> push-to-talk) modules.  I've posted the source code along with a
> README and a simple python script to control it.   The python script
> depends on pygtk to paint the push-to-talk button.  You can check it
> out at:
> 
> http://www.cozybit.com/projects/pa_ptt/
> 
> So far, I've played with it over two mesh nodes.  Performance is
> tolerable.  I expect to refine it over the next few weeks.  Thoughts,
> opinions, and patches are welcome.
> 
> Ciao,
> Brian
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-- 
Jim Gettys
One Laptop Per Child