On Sun, Jan 1, 2012 at 6:50 AM, Luke Sun <luke.skywalker.sun at gmail.com> wrote: > Thank you, Kevin. So the same story is going to happen if I modify > PJMEDIA_SND_DEFAULT_REC_LATENCY lower. right? > yes. Is there any reason in particular to change the default values? the default values should work just fine on most desktop PC. If any, they might be a problem for embedded devices.