Hi All, I have one doubt, suppose we have conference between 3 users (PCM companded voice channels) then we add the streams together with scaling but data which a user can receive will include his own voice information also or i think we should substract his info. from the combined data, also as the total sum of scaling factors should be 1 how we decide these scaling factors becoz these factors decides audio gain of each channel? Can you plz suggest me steps to follow to implenent voice conference using DSP(I am using Fixed point DSP TMS320c55x) and Components to use from DSP and level of buffering for incoming data. Thanks in advance. Rahul jadhav. Rahul Jadhav Junior Design Engineer Spectross Digital System (P) Ltd. No. 4, Siri Fort Road | New Delhi - 110049 Phone : +91-9990865914 | 011-26264077 Email : rahul.jadhav at spectross.com Web : www.spectross.com -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20080716/2f56e999/attachment-0001.htm