Hi, Could anyone explain how the earpiece x loudspeaker configuration is done when running PJSUA PC application (linux, windows). My question is how can I tell pjsua that the USB headset is the earpiece and the other is the loudspeaker, is it supossed to "just know"? I suppose that on the mobile it would know better... I see the: --capture-dev=id Audio capture device ID (default=-1) --playback-dev=id Audio playback device ID (default=-1) command line switches, but they doesn't answer my question. Att. Gabriel -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20150702/2d1459c7/attachment.html>