Hi, I try to use the echo canceller. The mic is connected to a camera, which generates g.711 (8khz) audio stream. This captures echo of the sound from speaker connected to a PC, which plays g.711 (8khz) audio. In this case, will speex work, if stream from speaker (decoded to 16-bit pcm) is used as spx_int16_t *rec, and stream played in the PC as spx_int16_t *play? (in speex_echo_cancellation API) Expecting your reply.. Thanks very much in advance.. Regards, Shaibu --------------------------------- Try the revolutionary next-gen Yahoo! Mail. Click here. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-dev/attachments/20070830/3c0f87a1/attachment.html