Multiple-Control-Change-Potentiometers.ino

Multiple-Control-Change-Potentiometers

This example demonstrates the use of MIDI Control Change potentiometers that can be used for changing effect parameters, volumes, pan and balance controls, etc. It can control almost any knob in your DAW software. This example shows how to define multiple potentiometers using an array.

Boards: 🛈

AVR, AVR USB, Nano Every, Due, Nano 33 IoT, Nano 33 BLE, UNO R4, Teensy 3.x

Connections

• A0: wiper of the first potentiometer
• A1: wiper of the second potentiometer
• ...
• A5: wiper of the sixth potentiometer

Connect the left terminal of the potentiometers to ground, and the right one to V_CC.

Behavior

• When you turn a potentiometer, you should receive MIDI Control Change events, with a value between 0 and 127.
• The analog inputs are filtered, so there shouldn't be any noise on the position. If there is, check your wiring, and make sure that the resistance of the potentiometers isn't too high (10 kΩ is ideal).

Mapping

Select the Arduino as a custom MIDI controller in your DAW, and use the MIDI learn option to assign the potentiometers to a function.

Written by PieterP, 2019-08-13
https://github.com/tttapa/Control-Surface

 
#include <Control_Surface.h> // Include the Control Surface library
 
// Instantiate a MIDI over USB interface.
USBMIDI_Interface midi;
 
// Instantiate an array of CCPotentiometer objects
CCPotentiometer potentiometers[] {
  {A0,        // Analog pin connected to potentiometer 1
   0x10},     // Controller number of the first potentiometer
  {A1,        // Analog pin connected to potentiometer 2
   0x11},     // Controller number of the second potentiometer
  {A2, 0x12}, // Etc.
  {A3, 0x13},
  {A4, 0x14},
  {A5, 0x15},
};
 
void setup() {
  Control_Surface.begin(); // Initialize Control Surface
}
 
void loop() {
  Control_Surface.loop(); // Update the Control Surface
}