Hi, I have downloaded the latest Speex_1.2rc1 and patched it with a patch I found on this forum regarding Fixed point AGC. I am utilizing the Echo cancellation successfully, I would like to use the AGC functionality for my DM642 fixed point processor, however, when I enable the agc using SPEEX_PREPROCESS_SET_AGC and run the preprocessing routine, it zeros my audio buffer. I would appreciate any insight into this issue anyone might have, am I doing something wrong, is there any documentation I should be looking at. Thanks in advance. James