Hi, I know in pjsip, there are 2 components that can used as clock: Clock Generate (in pjmedia_master_port) and in Sound Device Port. But when I debug, I see that Clock Generator is not used. So Sound Device Port use sound hardware's clock? What is hardware's clock rate? What is used to resample this hardware's clock rate? I heard Audio Converter but I can't see it in code. Is PJSUA_DEFAULT_CLOCK_RATE the clock rate after we resample ? And this is default to 16KHz, so this only works for 16KHz codec? (SILK 16KHZ would be better than SILK 24KHz) ??? Sorry for asking to many questions, but these are basic and I still cannot understand, thanks in advance -- Khoa Pham HCMC University of Science Faculty of Information Technology -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20130202/2361b1dc/attachment-0001.html>