This is very weird, but I bought a Quad Operator used back in January on Reverb. I’ve been using it a lot but there’s a lot of drift in the pitch, so today I tried to update the firmware.
Surprisingly, my module does not seem to have a USB port on the back. Also, my unit doesn’t have the “AR FM” input on the front. Rather It has one labeled “IN EXT”.
Is this maybe some sort of prototype unit? Is it possible to do a firmware update on a unit that doesn’t have a USB port on it?
I’ve included a picture of the front and back so you can see what I’m talking about. Hoping you can help.