Still no duplex. In fact, no playback. I have narrowed the issue down to a problem with the nitrate being set to 32 instead of 24. This happens despite specifically setting 24 in the .formats section of the quirk. On the recording side it doesn't seem to matter because the device is doing the encoding at 24 and the PC is receiving at 32...not ideal, but it functions because 24 bits fit into 32. But for playback, the PC is sending a 32 bit stream to a device that can only decode 24...and it crashes. If you go back through this thread, I posted the various settings I tried for .formats -- there are likely many that I have not tested. Perhaps there is another way to force 24 bits -- View this message in context: http://linux-audio.4202.n7.nabble.com/re-Zoom-R16-tp87487p89731.html Sent from the linux-audio-user mailing list archive at Nabble.com. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user