[Speex-dev] Echo cancellation and synchronization

Jean-Marc Valin jean-marc.valin at usherbrooke.ca
Sun Jan 4 20:28:32 PST 2009

Peter Vestberg a écrit :
> The problem seems to be that the sound output thread (and thus 
> speex_echo_playback()) sometimes executes three frames/"iterations" 
> before the sound input thread (and thus speex_echo_capture()) comes in. 
> How do I deal with this problem? I suspect I cannot really affect how 
> often the sound card lib requires a new frame or has one available.

Then I suggest doing the buffering yourself and using
speex_echo_cancellation() instead of the playback() and capture() calls.


More information about the Speex-dev mailing list