Hi, On Win, it is the speex preprocessor. I have found that 1200ms is too large to for the speex echo canceller to converge. Try 100 to 300 ms max. Most acoustic echo is in this range. If recording and playback is not in sync, i.e. different soundcards, it won't work either. Am 24.01.2013 21:16, schrieb John Mah: > On 2013-01-24 11:15 AM, Dede wrote: >> Hello all, >> I read docs and I can see that there's echo cancellation support in >> PJSUA. >> It seems also that on Mac OS, CoreAudio should do the trick. > > i think that you need to patch your sources to use the CoreAudio > backend. if i remember correctly, the portaudio backend is used by > default on mac osx builds. (see message by samuel vinson in the archives
