Jon, one more clarification on my part that I see is needed: by Empeg UI I actually meant the Empeg User Interface: buttons & rotary knob.

I assumed that by bringing the player >> on the PC << you intended to also create a software version of the Empeg UI (turning it from a hardware UI into a GUI). I see that's not what you intended and probably I read too much in your reference to PC.

All the rest (On Empeg hardware, or on Pi) is clear and I actually saw the interesting videos.

Thanks,