I’ve looked into making a Pocket Piano patch before, but I don’t have a PP to work from. If someone could upload a demo video running through every option, that would be a great starting point.
For the interface, I’d map PP knobs 1 and 2 to Organelle knobs 1 and 2, tune to knob 3, and since the Organelle has a dedicated volume knob, that leaves us with a free use for knob 4. I’d map the mode button to knob 4. That leaves the Organelle’s mode button free to use as the PP’s “button” button. It’s a bit more playable that way, imo. The Organelle’s LED can still serve as the mode LED. Alternatively, could make use of the Organelle’s menu knob for mode switching, but I would prefer avoiding menu diving to more closely simulate a PP.