As a part of a major project for a degree a Uni, I am trying to create a midi controller that sends values from two analog distance sensors. Each of the sensors values are mapped to MIDI values from 0-127. As I've never used Arduino or built any projects I have been really hanging on by the seat of my pants thus far, using AI to help me fast track coding as i'm under quite a short time frame. The current circuit and code work quite well, but i'm looking to add a feature and i'm quite stuck on it.
I'd like the midi values being output from the board to hold when I remove my hand from the range of the analog distance sensors. So that I can interact with the controller and leave the controlled parameters as they are before I pull away. I'm trying to avoid using another sensor or switch to activate a hold function. This is because the intended use of the instrument is with both hands, and you will lose one of the sensors values when you shift your hand to the hold button.
Does anyone have any ideas? I'll paste the working code below.
#include <USB-MIDI.h>
USBMIDI_CREATE_DEFAULT_INSTANCE();
// Define constants for the sensor pins and MIDI control parameters
const int sensorPin1 = A0; // Analog output pin of the first distance sensor connected to A0
const int sensorPin2 = A1; // Analog output pin of the second distance sensor connected to A1
const int midiControllerNumber1 = 1; // MIDI controller number for the first sensor
const int midiControllerNumber2 = 2; // MIDI controller number for the second sensor
const int midiChannel = 1; // MIDI channel to use
const int midiValueMin = 0; // Minimum MIDI value
const int midiValueMax = 127; // Maximum MIDI value
// Define variables for the moving average filter for sensor 1
const int numReadings = 20; // Number of readings to average
int sensorReadings1[numReadings]; // Array to store sensor 1 readings
int index1 = 0; // Index for storing the current sensor 1 reading
int total1 = 0; // Total sum of sensor 1 readings
int averageReading1 = 0; // Smoothed sensor 1 reading
// Define variables for the moving average filter for sensor 2
int sensorReadings2[numReadings]; // Array to store sensor 2 readings
int index2 = 0; // Index for storing the current sensor 2 reading
int total2 = 0; // Total sum of sensor 2 readings
int averageReading2 = 0; // Smoothed sensor 2 reading
void setup() {
Serial.begin(9600); // Initialize serial communication at 9600 baud rate
MIDI.begin(midiChannel); // Initialize MIDI communication
}
void loop() {
// Read the analog voltage from the first sensor
int sensorValue1 = analogRead(sensorPin1);
// Apply moving average filter for sensor 1
total1 = total1 - sensorReadings1[index1];
sensorReadings1[index1] = sensorValue1;
total1 = total1 + sensorReadings1[index1];
index1 = (index1 + 1) % numReadings;
averageReading1 = total1 / numReadings;
// Read the analog voltage from the second sensor
int sensorValue2 = analogRead(sensorPin2);
// Apply moving average filter for sensor 2
total2 = total2 - sensorReadings2[index2];
sensorReadings2[index2] = sensorValue2;
total2 = total2 + sensorReadings2[index2];
index2 = (index2 + 1) % numReadings;
averageReading2 = total2 / numReadings;
// Check if the sensor 1 value falls within the desired range
if (averageReading1 >= 130 && averageReading1 <= 500) {
// Map the sensor 1 value to MIDI range (20-127)
int midiValue1 = map(averageReading1, 130, 500, midiValueMin, midiValueMax);
// Send MIDI Control Change message with the mapped MIDI value for sensor 1
MIDI.sendControlChange(midiControllerNumber1, midiValue1, midiChannel);
// Print sensor 1 value and MIDI value to the serial monitor
Serial.print("Sensor 1 value: ");
Serial.print(averageReading1);
Serial.print("\t MIDI value 1: ");
Serial.println(midiValue1);
}
// Check if the sensor 2 value falls within the desired range
if (averageReading2 >= 130 && averageReading2 <= 500) {
// Map the sensor 2 value to MIDI range (20-127)
int midiValue2 = map(averageReading2, 130, 500, midiValueMin, midiValueMax);
// Send MIDI Control Change message with the mapped MIDI value for sensor 2
MIDI.sendControlChange(midiControllerNumber2, midiValue2, midiChannel);
// Print sensor 2 value and MIDI value to the serial monitor
Serial.print("Sensor 2 value: ");
Serial.print(averageReading2);
Serial.print("\t MIDI value 2: ");
Serial.println(midiValue2);
}
// Delay before next reading
delay(30); // Adjust delay as needed
}
type or paste code here
type or paste code here
