[shr] [om2009] call volume in shr-unstable

Risto H. Kurppa risto at kurppa.fi
Mon May 25 12:42:46 CEST 2009

On Mon, May 25, 2009 at 1:33 PM, Joerg Reisenweber <joerg at openmoko.org> wrote:
> Am Mo  25. Mai 2009 schrieb Yogiz:
>> Just to make sure I understand. SHR being echo free wasn't done with
>> the hidden echo-cancellation gsm command but with playing with the alsa
>> state files? Or was it both?
> It's been done by using the (not so hidden) AT%Nxxxx
> AdaptiveEchoCancellation&noisegate command. Too high feedback volume from
> earpiece to mic - especially when distorted (and so not exactly identical to
> the output signal) - may confuse AEC though.

My experience is that holding the volume adjustable by AUX during call
in values lower than 80(%) work good without echo. 100% will cause the
echo to appear.


| risto h. kurppa
| risto at kurppa dot fi
| http://risto.kurppa.fi

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