Hi All, I am developing SIP Client using PJSIP Lib. I have two application (one is UI interface and another is PJSIP lib). My UI application have 2-3 external sound source which are connected through USB port. My UI application responsible for sending and receiving audio packets from that devices. Now i want to send/receive adio frames frop PJSIP lib so that i can direct them to my sound devices and vice-versa. I have used set_no_snd_dev() and sending/receiving audio frames using pjmedia_port_get_frame() , pjmedia_port_put_frame() from PJ SIP Lib. but using the technique ->Receiving Audio Frames and playing it on my sound device is working fine. ->Audio is getting stretched on remote end (another SIP client ). I am using PCMA (8000Hz/Mono channel/160 sample per frame). When is saw pjsip log, i found "Master/Sound Under flow" errors which are coming after every 1ms: Please suggest me , what is i am doing wrong???? Regards *Vijay Kumar* -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20110924/a5ddcd3b/attachment.html>