Arduino to MIDI - Revision history

Nikilia: Replaced content with "PDF"

2026-01-21T09:48:12Z

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Nikilia at 14:42, 19 January 2026

2026-01-19T14:42:16Z

← Older revision		Revision as of 14:42, 19 January 2026
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			<nowiki>###</nowiki> ☎️ 2 potmeters 2 buttons code

			```cpp

			<nowiki>#</nowiki>include <MIDIUSB.h>

			int lastValueA0 = 0;

			int lastValueA1 = 0;

			int lastState2 = HIGH;

			int lastState3 = HIGH;

			void setup() {

			pinMode(A0, INPUT); // Pot 1

			pinMode(A1, INPUT); // Pot 2

			pinMode(2, INPUT_PULLUP); // Button 1

			pinMode(3, INPUT_PULLUP); // Button 2

			}

			void loop() {

			// ══════════════════════════════════════════════════════════

			// POTENTIOMETER 1 (A0) → CC 1

			// ══════════════════════════════════════════════════════════

			int valueA0 = analogRead(A0) / 8;

			if (valueA0 != lastValueA0) {

			midiEventPacket_t event = {0x0B, 0xB0, 60, valueA0};

			MidiUSB.sendMIDI(event);

			MidiUSB.flush();

			lastValueA0 = valueA0;

			}



			// ══════════════════════════════════════════════════════════

			// POTENTIOMETER 2 (A1) → CC 2

			// ══════════════════════════════════════════════════════════

			int valueA1 = analogRead(A1) / 8;

			if (valueA1 != lastValueA1) {

			midiEventPacket_t event = {0x0B, 0xB0, 61, valueA1};

			MidiUSB.sendMIDI(event);

			MidiUSB.flush();

			lastValueA1 = valueA1;

			}



			// ══════════════════════════════════════════════════════════

			// BUTTON 1 (Pin 2) → Note 60 (Middle C)

			// ══════════════════════════════════════════════════════════

			int state2 = digitalRead(2);

			if (state2 != lastState2) {

			if (state2 == LOW) {

			midiEventPacket_t noteOn = {0x09, 0x90, 60, 127};

			MidiUSB.sendMIDI(noteOn);

			} else {

			midiEventPacket_t noteOff = {0x08, 0x80, 60, 0};

			MidiUSB.sendMIDI(noteOff);

			}

			MidiUSB.flush();

			lastState2 = state2;

			}



			// ══════════════════════════════════════════════════════════

			// BUTTON 2 (Pin 3) → Note 61 (C#)

			// ══════════════════════════════════════════════════════════

			int state3 = digitalRead(3);

			if (state3 != lastState3) {

			if (state3 == LOW) {

			midiEventPacket_t noteOn = {0x09, 0x90, 61, 127};

			MidiUSB.sendMIDI(noteOn);

			} else {

			midiEventPacket_t noteOff = {0x08, 0x80, 61, 0};

			MidiUSB.sendMIDI(noteOff);

			}

			MidiUSB.flush();

			lastState3 = state3;

			}



			delay(10);

			}

			```

Nikilia at 12:35, 19 January 2026

2026-01-19T12:35:36Z

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Nikilia at 12:32, 19 January 2026

2026-01-19T12:32:35Z

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Nikilia: Created page with "# Arduino to MIDI guide ## Setup 1. Install MIDIUSB library https://docs.arduino.cc/libraries/midiusb/ 2. Add the MIDIUSB.h Library: Go to Tools < Manage Libraries... 3. Search for "MIDIUSB" by Gary Grewal 4. Install the latest version 5. Select your board: Tools > Board > Arduino Leonardo (or Pro Micro) ## 🎛️🎚️ Potentiometers / Sliders ### What you need: - 1 potentiometer or slider - 3 wires ### How to connect: ``` Potentiometer: ├─ Left pin / GND..."

2026-01-19T12:31:39Z

Created page with "# Arduino to MIDI guide ## Setup 1. Install MIDIUSB library https://docs.arduino.cc/libraries/midiusb/ 2. Add the MIDIUSB.h Library: Go to Tools < Manage Libraries... 3. Search for "MIDIUSB" by Gary Grewal 4. Install the latest version 5. Select your board: Tools > Board > Arduino Leonardo (or Pro Micro) ## 🎛️🎚️ Potentiometers / Sliders ### What you need: - 1 potentiometer or slider - 3 wires ### How to connect: ``` Potentiometer: ├─ Left pin / GND..."

New page

# Arduino to MIDI guide

## Setup

1. Install MIDIUSB library https://docs.arduino.cc/libraries/midiusb/
2. Add the MIDIUSB.h Library: Go to Tools < Manage Libraries...
3. Search for "MIDIUSB" by Gary Grewal
4. Install the latest version
5. Select your board: Tools > Board > Arduino Leonardo (or Pro Micro)

## 🎛️🎚️ Potentiometers / Sliders

### What you need:

- 1 potentiometer or slider
- 3 wires

### How to connect:

```
Potentiometer:
├─ Left pin / GND → GND
├─ Middle pin / Signal → A0 (or A1, A2, A3...)
└─ Right pin / VCC / Power → 5V
```

### Code

```cpp
#include <MIDIUSB.h>

int lastValue = 0;

void setup() {
pinMode(A0, INPUT); // ← Change A0 to your pin
}

void loop() {
int value = analogRead(A0) / 8; // ← Change A0 to match setup

if (value != lastValue) {
midiEventPacket_t event = {0x0B, 0xB0, 1, value};
// ↑ ← CC number
MidiUSB.sendMIDI(event);
MidiUSB.flush();
lastValue = value;
}

delay(10);
}
```

**To customize:**

- Change A0 to A1, A2, A3 etc. for different pins
- Change the CC number 1 a different one for every input

## 🔘 Note button

### What you need

- 1 push button
- 2 wires

### How to connect

```
Button:
├─ One side → Pin 2 (or 3, 4, 5...)
└─ Other side → GND
```

### Code

```cpp
#include <MIDIUSB.h>

int lastState = HIGH;

void setup() {
pinMode(2, INPUT_PULLUP); // ← Change 2 to your pin
}

void loop() {
int state = digitalRead(2); // ← Change 2 to match setup

if (state != lastState) {
if (state == LOW) {
// Button pressed
midiEventPacket_t noteOn = {0x09, 0x90, 60, 127};
// ↑ ↑
// note velocity
MidiUSB.sendMIDI(noteOn);
} else {
// Button released
midiEventPacket_t noteOff = {0x08, 0x80, 60, 0};
// ↑
// note
MidiUSB.sendMIDI(noteOff);
}
MidiUSB.flush();
lastState = state;
}

delay(10);
}
```

**To customize:**

- Change pin `2` to `3`, `4`, `5` etc.
- Change note number `60`:
- `60` = C (middle C)
- `62` = D
- `64` = E
- `65` = F
- `67` = G
- `69` = A
- `71` = B
- `72` = C (one octave higher)
- Change velocity `100` (0-127, higher = louder)
-

## 📏🪢 Pull sensor / distance sensor

### What you need:

- Any sensor with analog output
- Wires as needed for your sensor

### How to connect:

```
Sensor:
├─ VCC/Power → 5V
├─ GND → GND
└─ Signal → A0 (or A1, A2, A3...)
```

### Code to copy:

```cpp
#include <MIDIUSB.h>

int lastValue = 0;

void setup() {
pinMode(A0, INPUT); // ← Change A0 to your pin
}

void loop() {
int sensorValue = analogRead(A0); // ← Change A0 to match setup
int midiValue = map(sensorValue, 0, 1023, 0, 127);
// ↑ ↑
// adjust these if needed

if (abs(midiValue - lastValue) > 1) { // Ignore tiny changes
midiEventPacket_t event = {0x0B, 0xB0, 74, midiValue};
// ↑ ← CC number
MidiUSB.sendMIDI(event);
MidiUSB.flush();
lastValue = midiValue;
}

delay(10);
}
```

### To customize:

- Change `A0` to your sensor pin
- Change `0, 1023` in the `map()` function if your sensor gives different values
- Change CC number `74` to control different parameters

### ☎️ CC on/off / Momentary

## 📝 Common Pin Reference

### Analog Pins (for sensors & potentiometers):

`A0`, `A1`, `A2`, `A3`, `A4`, `A5`

### Digital Pins (for buttons):

`2`, `3`, `4`, `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `13`

### Don't use:

- Pin `0` and `1` (used for USB communication)

## Sending notes

```cpp
C4 = 60 (Middle C)
C#4 = 61
D4 = 62
D#4 = 63
E4 = 64
F4 = 65
F#4 = 66
G4 = 67
G#4 = 68
A4 = 69
A#4 = 70
B4 = 71
C5 = 72
```

Each octave adds or subtracts 12:

- C3 = 48 (one octave lower)
- C5 = 72 (one octave higher)

## CC

You can use any CC from 0-119, but these are the most common!