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

[Joerg Reisenweber]

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.

cheers
jOERG
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