On Jan 14, 2008, at 11:51 AM, Benny Prijono wrote: > On 1/11/08, Norman Franke <norman at myasd.com> wrote: > Great! I've temporarily worked around this by ensuring only a > single output is active at the start of the call (when we play a > recorded message.) Other playbacks are still a problem, but happen > much less often. > > I've then set the gain of the caller to 250% which makes the > recordings sound good. > > However, I am anxious for a better fix to the conference mixing > code. If you need more info, let me know. > > It's here, finally. The SVN trunk now has a brand new conference > algorithm ( http://www.pjsip.org/trac/ticket/449). The main feature > of the new algorithm is it's no longer uses multiplication to mix > signal, but rather it just sums it. Which means there shouldn't be > any reduction in audio level (unlike the old one), and also it > should be more efficient. But the drawback is when there are too > many sources talking at the same time, the audio will be clipped to > avoid overflow. There is a simple AGC to smoothen the transition, > but nevertheless some audio clicks can't be avoided when signal has > to be clipped immediately. > > We've spent couple of days testing the new algorithm, and I think > it should be good now. But since this is major change, surely there > must be some bugs that slip away, so it would be great if you could > give it a spin. Great! One issue immediately, if I set the volume of a playback to 0.6 all I get it static. > Also http://www.pjsip.org/trac/ticket/447 may be related to your > problem too (you mentioned something about playing WAV file without > the LOOP mode). Not sure. I'm using a simple port callback to play audio, so I know I'm feeding in all the data. Even if I pad the last buffer with zeros and tell PJ it's a full buffer, I still get that semi-random burst of noise. Norman Franke Answering Service for Directors, Inc. www.myasd.com -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080114/2d3c0180/attachment.html
