Thanks for the quick response. No. My platform is IOS 5 on iPhone 4S. I also tried to increase the size of de-jitter buffer by doing jb_max=1000. I didn't see the 1 second delay either. What should be my best practice when it comes to put artificial delay into the audio stream? Thanks again. On Feb 4, 2012, at 1:02 PM, Johan Lantz <johan.lantz at genaker.net> wrote: > Unless you are using Symbian with xxx-direct audio api, this should work as you expect. > > /Johan > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org