The "Designer Box" Project

Building a DIY, easy-to-use MIDI controller for sound designers in tech rehearsals.

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Instructions

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Watch the Designer Box in Action:

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Code

​#include <MIDI.h>
#include <Bounce.h>
// Both of these libraries are necessary for this to function properly.

const int channel = 16; // sending all MIDI in this code on last channel. Keeps it away from other devices, most of the time.

const int maxValue = 127; // can be used both for Control Change and MIDI note ON
const int minValue = 0; // can be used both for Control Change and MIDI note OFF
const int ledPin = 13; // internal LED (Teensy LC)

Bounce button1 = Bounce(1, 5);
Bounce button2 = Bounce(2, 5);
Bounce button3 = Bounce(3, 5);
Bounce button4 = Bounce(4, 5);
Bounce button5 = Bounce(5, 5);
Bounce button6 = Bounce(6, 5);
Bounce button7 = Bounce(7, 5);
Bounce button8 = Bounce(8, 5);
// 5 = 5 ms debounce time, which is appropriate for good quality mechanical pushbuttons (***CHANGE IF NECESSARY***)

void setup() // set up pins based on what type of signal is going in. In this case, the pins are reading the buttons switching on and off
{
    pinMode(1, INPUT_PULLUP);
    pinMode(2, INPUT_PULLUP);
    pinMode(3, INPUT_PULLUP);
    pinMode(4, INPUT_PULLUP);
    pinMode(5, INPUT_PULLUP);
    pinMode(6, INPUT_PULLUP);
    pinMode(7, INPUT_PULLUP);
    pinMode(8, INPUT_PULLUP);
    pinMode(ledPin, OUTPUT); // internal LED for Teensy LC
}

void loop() {

// setup for the microcontroller to continue reading the status of the button:
button1.update();
button2.update();
button3.update();
button4.update();
button5.update();
button6.update();
button7.update();
button8.update();

// when specified button is PRESSED:
if (button1.fallingEdge()) {
  usbMIDI.sendControlChange(1, maxValue, channel);
  digitalWrite(ledPin, HIGH);
}

if (button2.fallingEdge()) {
  usbMIDI.sendControlChange(2, maxValue, channel);
  digitalWrite(ledPin, HIGH);
}

if (button3.fallingEdge()) {
  usbMIDI.sendControlChange(3, maxValue, channel);
  digitalWrite(ledPin, HIGH);
}

if (button4.fallingEdge()) {
  usbMIDI.sendControlChange(4, maxValue, channel);
  digitalWrite(ledPin, HIGH);
}

if (button5.fallingEdge()) {
  usbMIDI.sendControlChange(5, maxValue, channel);
  digitalWrite(ledPin, HIGH);
}

if (button6.fallingEdge()) {
  usbMIDI.sendControlChange(6, maxValue, channel);
  digitalWrite(ledPin, HIGH);
}

if (button7.fallingEdge()) {
  usbMIDI.sendControlChange(7, maxValue, channel);
  digitalWrite(ledPin, HIGH);
}

if (button8.fallingEdge()) {
  usbMIDI.sendControlChange(8, maxValue, channel);
  digitalWrite(ledPin, HIGH);
}

// when specified button is RELEASED:
if (button1.risingEdge()) {
  usbMIDI.sendControlChange(1, minValue, channel);
  digitalWrite(ledPin, LOW);
}
 
if (button2.risingEdge()) {
  usbMIDI.sendControlChange(2, minValue, channel);
  digitalWrite(ledPin, LOW);
}

if (button3.risingEdge()) {
  usbMIDI.sendControlChange(3, minValue, channel);
  digitalWrite(ledPin, LOW);
}

if (button4.risingEdge()) {
  usbMIDI.sendControlChange(4, minValue, channel);
  digitalWrite(ledPin, LOW);
}

if (button5.risingEdge()) {
  usbMIDI.sendControlChange(5, minValue, channel);
  digitalWrite(ledPin, LOW);
}

if (button6.risingEdge()) {
  usbMIDI.sendControlChange(6, minValue, channel);
  digitalWrite(ledPin, LOW);
}

if (button7.risingEdge()) {
  usbMIDI.sendControlChange(7, minValue, channel);
  digitalWrite(ledPin, LOW);
}

if (button8.risingEdge()) {
  usbMIDI.sendControlChange(8, minValue, channel);
  digitalWrite(ledPin, LOW);
}
 while (usbMIDI.read()){ // necessary to prevent crashing, in case the microcontroller receives MIDI it was not prepared to decode
}
}