How to record calls

Rui Miguel Silva Seabra rms at
Mon Mar 16 11:51:05 CET 2009

On Mon, Mar 16, 2009 at 11:43:25AM +0100, Richard Kralovic wrote:
> >   I was under the impression that audio for calls bypasses the CPU and 
> > operating system entirely, going straight from the sound chip to the GSM 
> > chip; if this is the case then such a recording wouldn't be possible.
> That's true, but it should be possible to configure alsa mixer settings
> in such a way that the GSM audio is routed both to the speaker and to
> the ADC converter of the soundcard. It shouldn't be too hard, I guess
> you just need to study the mixer settings a bit:

And prevent suspend! On longer calls my openmoko suspends during the
call. The call continues, of course, but the first time it happened I
was pretty freaked out! :)



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