[Speex-dev] AEC learning behaviour

Arun Raghavan arun.raghavan at collabora.co.uk
Tue May 24 19:52:13 PDT 2011

On Tue, 2011-05-24 at 11:09 -0400, Jean-Marc Valin wrote:
> The fact that the AEC takes a few seconds to converge is normal. The  

Do you think there might be a way to reduce this?

> fact that it needs to completely re-converge in the middle of a call  
> probably indicates that something went "wrong" in the audio  
> capture/playback. For example, that could be an overrun/underrun in  
> the soundcard buffer, or the user changing a volume control after the  
> AEC, or moving the speakers, ... anything that changes the impulse  
> response.

I didn't see any abnormal behaviour from PulseAudio or the app
corresponding to these resets. I'll try to see if I can pin down the
actual cause.

Thanks and cheers,

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