I am not able to get any audio from iPad or Mac when connected via USB. The device shows in System → Sounds on both devices but no audio is passed from the device to the TP-7. I have tried to upgrade the firmware, chaange cable and ports, reset the TP-7 but no luck. Turning it on whilst pressing stop makes it visible as a disk but then it disappears in the sound setting. I have tried with the 1/4" jack removed.