That's fine. Buttons are good and well-understood. I suspect that for myself, a fixed knob or set of fixed physical buttons is not the only interface that I c

That's fine. Buttons are good and well-understood. I suspect that for myself, a fixed knob or set of fixed physical buttons is not the only interface that I could use without looking. I'd like to see more experimentation, here. I feel like there's unexplored territory.