I have two mobile phones, one is HTC 606W(Android 4.1, API Level 16), the other is Huawei(Android 4.1, API Level 16). I called from HTC to Huawei with Pjsua2, but there was no sound on HTC. If I call from Huawei to my laptop(Debian 7), everything is OK. So there must be something wrong with HTC device. I printed audio capture/playback devices to console, only one device found, "Android JNI". I tried following code without luck either. try { AudioMediaPlayer player = new AudioMediaPlayer(); AudioMedia med = MyApp.ep.audDevManager().getPlaybackDevMedia(); player.createPlayer("/sdcard2/a.wav"); player.startTransmit(med); return; } catch (Exception e1) { e1.printStackTrace(); //return; }? What can I do to solve it? The code base I tested is pjproject-2.3. Best regards Leo -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20141207/f414dc8d/attachment.html>