I have experienced the same problem with MIDI not working with the USB cable plugged in. I’ve only had this unit a few days and I was setting it up via USB. MIDI was sporadic at best and then it stopped working at all. I tried multiple MIDI cables, verified MIDI messages via a MIDI monitor, and the H9 was just not responding to MIDI. I happened to unplug the USB connect then MIDI worked fine. This was very frustrating to say the least. Also, the USB connect is very unstable. Connection is lost all the time. As someone else said, for $700, this should not be happening. Eventide needs to fix this issue. We deserve better.
