This MIDI breakout board/shield will give you full MIDI inout and output leaving all the analog and digital pins to use for knobs (up to 6) and buttons (up to 12 easily, 36 with a little work).
This MIDI breakout board/shield will give you full MIDI inout and output leaving all the analog and digital pins to use for knobs (up to 6) and buttons (up to 12 easily, 36 with a little work).