Hi, we're using the Splitter/Combiner port for decoupling 2 media ports running on different threads. But actually only the Upstream side is working perfectly. The Downstream produces a really bad and very poor sound! We've increase the MAX_BUF_CNT of both (downstream and upstream) but with no cahnge to the Downstream sound quality. Can someone please give us a hint to overcome this issue. Thx Mike ps The call to pjmedia_port_put_frame and pjmedia_port_get_frame are in sync