[alsa-devel] echo-cancellation plugin advice?

Well, asym wouldn't be the answer. Basically you'll need to open two slave PCMs in one plugin. So, it's no simple filter-type plugin. It's doable, but not easy as it sounds, I guess.

Takashi, can you please further explain why asym is not the solution and what you see as a problem? I am also trying to figure out if it would be possible to create such a plugin for ALSA? I am still searching for some good starting points on how to write an ALSA plugin...

Jean-Marc Valin (http://lists.linuxaudio.org/pipermail/linux-audio-dev/2005-June/012454.html) already released his work as part of speex but as far I know there is no plugin that has been made out of it?

Thanks for any hint!