search for: echocallation

Hello everyone, I'm a new comer to this mailing list. I've been trying to use speex echo cancellation function ,but I haven't seen good effect,then I want to know how to use it,please help me,thanks!I have read 'testecho.c' but it didn't help me.So I have a big question, speex exactly can eliminate the echo of the latest version,I really need your guidance. --------------