APC Mini MK2 LED Mapping Guide

Visual reference for button positions and their corresponding MIDI note numbers.

Physical Layout Overview

┌─────────────────────────────────────────────────────┐
│                                                     │
│  [SHIFT]                              [SCENE 1-8]   │
│                                         112-119     │
│  ┌───┬───┬───┬───┬───┬───┬───┬───┐    ┌───┐       │
│  │56 │57 │58 │59 │60 │61 │62 │63 │    │112│ Row 8  │
│  ├───┼───┼───┼───┼───┼───┼───┼───┤    ├───┤       │
│  │48 │49 │50 │51 │52 │53 │54 │55 │    │113│ Row 7  │
│  ├───┼───┼───┼───┼───┼───┼───┼───┤    ├───┤       │
│  │40 │41 │42 │43 │44 │45 │46 │47 │    │114│ Row 6  │
│  ├───┼───┼───┼───┼───┼───┼───┼───┤    ├───┤       │
│  │32 │33 │34 │35 │36 │37 │38 │39 │    │115│ Row 5  │
│  ├───┼───┼───┼───┼───┼───┼───┼───┤    ├───┤       │
│  │24 │25 │26 │27 │28 │29 │30 │31 │    │116│ Row 4  │
│  ├───┼───┼───┼───┼───┼───┼───┼───┤    ├───┤       │
│  │16 │17 │18 │19 │20 │21 │22 │23 │    │117│ Row 3  │
│  ├───┼───┼───┼───┼───┼───┼───┼───┤    ├───┤       │
│  │ 8 │ 9 │10 │11 │12 │13 │14 │15 │    │118│ Row 2  │
│  ├───┼───┼───┼───┼───┼───┼───┼───┤    ├───┤       │
│  │ 0 │ 1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │    │119│ Row 1  │
│  └───┴───┴───┴───┴───┴───┴───┴───┘    └───┘       │
│   C1  C2  C3  C4  C5  C6  C7  C8                   │
│                                                     │
│  ┌───┬───┬───┬───┬───┬───┬───┬───┐                │
│  │100│101│102│103│104│105│106│107│  [TRACK 1-8]   │
│  └───┴───┴───┴───┴───┴───┴───┴───┘                │
│                                                     │
│  ════════════════════════════════  [FADERS 1-9]    │
│   F1  F2  F3  F4  F5  F6  F7  F8  F9(Master)       │
│  CC48 CC49 CC50 CC51 CC52 CC53 CC54 CC55 CC56      │
│                                                     │
└─────────────────────────────────────────────────────┘

Pad Grid Mapping (Notes 0-63)

8x8 RGB pad matrix with full color support:

Row	Col 1	Col 2	Col 3	Col 4	Col 5	Col 6	Col 7	Col 8
8	56	57	58	59	60	61	62	63
7	48	49	50	51	52	53	54	55
6	40	41	42	43	44	45	46	47
5	32	33	34	35	36	37	38	39
4	24	25	26	27	28	29	30	31
3	16	17	18	19	20	21	22	23
2	8	9	10	11	12	13	14	15
1	0	1	2	3	4	5	6	7

Coordinate Conversion Functions

// Convert (row, column) to MIDI note (1-indexed coordinates)
function coordToNote(row: number, col: number): number {
  return (row - 1) * 8 + (col - 1);
}

// Convert MIDI note to (row, column) (1-indexed)
function noteToCoord(note: number): { row: number; col: number } {
  return {
    row: Math.floor(note / 8) + 1,
    col: (note % 8) + 1
  };
}

// Convert (x, y) to MIDI note (0-indexed coordinates)
function xyToNote(x: number, y: number): number {
  return y * 8 + x;
}

// Convert MIDI note to (x, y) (0-indexed)
function noteToXY(note: number): { x: number; y: number } {
  return {
    x: note % 8,
    y: Math.floor(note / 8)
  };
}

Track Buttons (Notes 100-107)

Bottom row, single-color red LEDs:

Button	Track 1	Track 2	Track 3	Track 4	Track 5	Track 6	Track 7	Track 8
Note	100	101	102	103	104	105	106	107
Hex	0x64	0x65	0x66	0x67	0x68	0x69	0x6A	0x6B

Velocity values:

• 0 = Off
• 1 = On
• 2 = Blink

Scene Launch Buttons (Notes 112-119)

Right column, single-color green LEDs:

Button	Scene 1	Scene 2	Scene 3	Scene 4	Scene 5	Scene 6	Scene 7	Scene 8
Note	112	113	114	115	116	117	118	119
Hex	0x70	0x71	0x72	0x73	0x74	0x75	0x76	0x77
Row	8	7	6	5	4	3	2	1

Velocity values:

• 0 = Off
• 1 = On
• 2 = Blink

Special Buttons

Button	Note	Hex	LED
Shift	122	0x7A	None

LED Types by Region

Region	Notes	LED Type	Colors
Pad Grid	0-63	RGB	128 palette + custom RGB
Track	100-107	Single	Red only
Scene	112-119	Single	Green only

Common Patterns

Light entire row

function lightRow(output: Output, row: number, velocity: number) {
  for (let col = 0; col < 8; col++) {
    const note = (row - 1) * 8 + col;
    output.send('noteon', { note, velocity, channel: 6 });
  }
}

Light entire column

function lightColumn(output: Output, col: number, velocity: number) {
  for (let row = 0; row < 8; row++) {
    const note = row * 8 + (col - 1);
    output.send('noteon', { note, velocity, channel: 6 });
  }
}

Light diagonal

function lightDiagonal(output: Output, velocity: number) {
  for (let i = 0; i < 8; i++) {
    const note = i * 8 + i;
    output.send('noteon', { note, velocity, channel: 6 });
  }
}

Clear all pads

function clearAllPads(output: Output) {
  for (let note = 0; note < 64; note++) {
    output.send('noteon', { note, velocity: 0, channel: 0 });
  }
}