Thank you both for your detailed replies.
I was hoping I could listen to both USB connections and then simply record what was coming in one USB connection and pass it to the other USB connection.
I know people have done this with a Tonex One...
Hoping someone can point me in the right direction to do this. I have used MIDI over serial and USB and the USB host so I am comfortable implementing this sort of thing.
I want to be able to plug a Teensy 4.1 into my computer (Mac mini) and a...