On 19 Dec, 2010, at 15:50, Ming wrote: > Yes, the audio will stop, that is the correct behavior because current > pjsua doesn't support Mac's input device monitoring (such as headphone > plug/unplug). I you sure those are related? PJSIP never supported audio device monitoring (I always did it myself in my app), but plugging/unplugging headphones always worked great before the release of Mac OS X 10.6. Alexei