arduino midi drum code

 Here's an example code for MIDI drum using 8 piezo sensors on an Arduino Uno board:

scss
#include <MIDI.h> // Include the MIDI library

// Define the piezo sensor pins
const int piezoPins[8] = {A0, A1, A2, A3, A4, A5, A6, A7};

// Define the MIDI note numbers for each sensor
const int noteNumbers[8] = {36, 38, 41, 43, 46, 48, 50, 51};

// Define the MIDI channel to send on
const int midiChannel = 10;

// Set the minimum threshold for triggering a note
const int threshold = 20;

// Create an instance of the MIDI library
MIDI_CREATE_DEFAULT_INSTANCE();

void setup() {
  // Set all piezo pins as inputs
  for (int i = 0; i < 8; i++) {
    pinMode(piezoPins[i], INPUT);
  }

  // Initialize the MIDI library
  MIDI.begin(midiChannel);
}

void loop() {
  // Read the sensor values
  int sensorValues[8];
  for (int i = 0; i < 8; i++) {
    sensorValues[i] = analogRead(piezoPins[i]);
  }

  // Check if any of the sensors have been triggered
  for (int i = 0; i < 8; i++) {
    if (sensorValues[i] > threshold) {
      // Map the sensor value to a MIDI velocity (0-127)
      int velocity = map(sensorValues[i], 0, 1023, 0, 127);

      // Send the MIDI note on message
      MIDI.sendNoteOn(noteNumbers[i], velocity, midiChannel);

      // Wait a short time
      delay(10);

      // Send the MIDI note off message
      MIDI.sendNoteOff(noteNumbers[i], 0, midiChannel);
    }
  }
}

This code reads the analog values from each piezo sensor and maps them to a MIDI velocity value (0-127). If the value is above a certain threshold, a MIDI note on message is sent for the corresponding note number and velocity. After a short delay, a MIDI note off message is sent to stop the note. The code uses the MIDI library to handle the MIDI communication. You will need to connect the piezo sensors to the Arduino Uno board and connect the board to a MIDI device to hear the output.