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<DIV><FONT face="MS UI Gothic">Hi,</FONT></DIV>
<DIV><FONT face="MS UI Gothic"></FONT> </DIV>
<DIV><FONT face="MS UI Gothic">Can somebody show me about the working of
Asterisk Meetme audio mixing.<BR> <BR>Now, I have found out the working of
Meetme audio mixing shown below.<BR>It seems that softphone of some conference
users and asterisk build RTP session<BR>separately(per user).<BR>Each time
asterisk(app_meetme.c) receive RTP packet from <BR>the conference user, traslate
the codec of payload data to signed linear <BR>and write to pseudo
device.</FONT></DIV>
<DIV><FONT face="MS UI Gothic"></FONT> </DIV>
<DIV><FONT face="MS UI Gothic">I want to know how to zaptel mix
frames(audio data) from users,<BR>after asterisk write to pseudo
device.</FONT></DIV>
<DIV><FONT face="MS UI Gothic"></FONT> </DIV>
<DIV><FONT face="MS UI Gothic">I confirmed that in case that 3 users participate
in Meetme conference and<BR>only one user speek on the softphone, this users
voice is recognized and <BR>heard on the softpone of the other two users.<BR>But
2 user speek on the softphone at the same time, I can not hear both of <BR>their
voice on the other user's softphone.</FONT></DIV>
<DIV><FONT face="MS UI Gothic"></FONT> </DIV>
<DIV><FONT face="MS UI Gothic">I want to know the mixing algorithm of asterisk
and zaptel.<BR>One of mixing algorithm is that every sampling
time(20ms),<BR>mixer sums the encoded audio value (signed linear value) of the
other users.<BR>I think this is the most popular audio mixing
algorithm.<BR>Otherwise, how asterisk and zaptel are working?<BR> <BR>Best
regards,<BR>Takashi.</FONT></DIV></BODY></HTML>