midi-protocol-lookup

APC Mini MK2 MIDI Protocol Reference

Quick reference for MIDI protocol. For complete details, see reference.md.

MIDI Message Structure

• Note On: [0x9n, note, velocity] (n = channel 0-15)
• Note Off: [0x8n, note, velocity]
• Control Change: [0xBn, cc, value]

Note Mapping

Region	Notes	Purpose
Pad Grid	0-63	8x8 RGB pads (row * 8 + col)
Track Buttons	100-107	Red LEDs
Scene Buttons	112-119	Green LEDs
Shift	122	No LED
Faders (CC)	48-56	CC 48-55 + Master 56

MIDI Channel Effects

Channel	Effect
0-6	Brightness 10%-100%
7-10	Pulse animation
11-15	Blink animation

Use channel 6 (0x96) for full brightness.

SysEx Custom RGB

F0 47 7F 4F 24 00 08 [pad] [pad] [R-MSB] [R-LSB] [G-MSB] [G-LSB] [B-MSB] [B-LSB] F7

RGB encoding:

const encodeRGB = (value: number): readonly [number, number] =>
  [(value >> 7) & 0x01, value & 0x7F] as const;