Hello, >From the media-flow article, it seems that audio decoding is done at the play thread. I wonder if decoding would consume some CPU time, then play thread cannot play audio 'all the time'. I think it would degrade the voice quality especially for low-end CPU and for complex codec (such as G.729). For example, if it take 2ms to decode 3200 samples (8000 sample rates), then the actual play out time is 200+3 = 203 ms. Is there any potential problem here? Best Regards, Xu Yun