I have recently acquired a Doepfer A190-4 USB/MIDI CV/GATE module and installed it in my Make Noise Shared System (black/gold) which is connected to my Mac Pro via USB using Logic Pro 9.1.8.

When I try to record via the USB connection, I get all sorts of stuck notes and  MIDI feedback (for lack of a better tern). Example, I put A190-4 track in record and press  a key on my MIDI keyboard the note gets recorded and never stops and continues to record over and over even though I have lifted my finger off of the key, I press a second key and second key gets recorded and never stops in addition to the 1st key, etc. It feels like a MIDI loop or feedback. In normal circumstances one would turn off "MIDI Thru" on a given instrument. Unfortunately the A190-4 has no such function. Using the MIDI connection with the A190-4 there are no issues but I have no available MIDI ports on my patch bay hence why I would like to make the USB port work.

The other logical place I looked was the "Audio MIDI Setup" app but unfortunately here the A190-4 ports (in/out) are grayed out so I can not turn the MIDI OUT to off.

Ive emailed Doepfer and they in short stated that there is a feedback issue that happens with the USB port and they will consider fixing it with the next update (not the answer I was hoping for)

Anyone have any suggestions as how to stop this from happening