I hate to think of the possible echo if you change the volume and a sip device didn't know about it. It wouldn't effectively use the echo cancellation on board, I am not an expert with echo cancellation however.
It should be possible to just multiply each byte of a waveform by a percentage if the codec is slinear/ulaw/alaw or similar almost as quickly as it passes from one network stream to the next. I would snag the source for like xmms if it can do software volume control and peek into it.. could be valuable. Let us know how well the echo cancellation works in speakerphone eh! _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
