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Hi yahoos, I am now using ansi c source for 1/2 rate gsm for a software driven voice applicaton . is it neccesary to use DTX, VAD in the minimum implementation .I ask this because the speech output I get is disturbed by clicking sounds and breaksand noise especially when the loudness of sound increases. I am confused how to initialize this codec proprly. Hope any one who have worked in gsm will help . Bye sij ____________________________________________________________ |