[Speex-dev] AEC fails for maximum volume

Jean-Marc Valin jean-marc.valin at usherbrooke.ca
Sat Oct 4 12:27:43 PDT 2008

Shaheer Shaikh a écrit :
> Hi
> I am using speex 1.2-beta-3. I got AEC working on windows CE platform by
> synchronizing MIC and speaker frames. The AEC is working perfectly fine
> for default volume but fails miserably for max volume level. Are there
> any more changes i need to do if we increase volume of device? 

The problem when you increase the volume is that you end up with
clipping/saturation/distortion. That's *non-linear* and there's nothing
the echo canceller can do about it. Set your gear to a decent,
non-saturating volume and your ears will be happier too.


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