My First Instrument

My Arduino arrived today, and after making sure everything worked properly, I built my first musical instrument from the thing.

It's just a little example to make sure I understand how to do MIDI with it. There's a button. You press it, and it plays a random note until you release it. Press it again, and it plays a different random note.

And here'smy first performance.

Elliot Carter, watch out.

Code:

#include "MIDI.h"

/*
Circuit:

MIDI OUT to Arduino Serial pin 1
MIDI IN from Arduino Serial pin 0

Digital pin 2 to a pushbutton switch, and to 5v through a 10k resistor
other leg of switch to 5v

*/

#define LED 13
#define BUTTON 2

int buttonState = LOW;
int prevButtonState = LOW;
int note = 43;

void setup() {
  MIDI.begin(1);
  pinMode(LED, OUTPUT);
  pinMode(BUTTON, INPUT);
}

void loop() {
  buttonState = digitalRead(BUTTON);
  if (buttonState == HIGH && prevButtonState == LOW) {
    prevButtonState = HIGH;
    digitalWrite(LED, HIGH);
    MIDI.sendNoteOn(note, 127, 1);
  } else if (buttonState == LOW) {
    if (prevButtonState == HIGH) {
      prevButtonState = LOW;
      MIDI.sendNoteOff(note, 0, 1);
      note = random(30, 70);
    }
    digitalWrite(LED, LOW);
  }
}