/*
  Melody

  Plays a melody

  circuit:
  - 8 ohm speaker on digital pin 8

  created 21 Jan 2010
  modified 30 Aug 2011
  by Tom Igoe

  This example code is in the public domain.

  http://www.arduino.cc/en/Tutorial/Tone
*/

#include "pitches.h"

int melody[] = {
  NOTE_C4, NOTE_C4, NOTE_G4, NOTE_G4, NOTE_A4, NOTE_A4, NOTE_G4, NOTE_F4, NOTE_F4, NOTE_E4,
NOTE_E4, NOTE_D4, NOTE_D4, NOTE_C4};
// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
  1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };

 int buzzerPin = 9;
void setup() {
}

void loop() {

    // iterate over the notes of the melody:
  for (int thisNote = 0; thisNote < 8; thisNote++) {
    int sensorReading = analogRead(A0);
    int thisPitch = map(sensorReading, 400, 1000, 1800, 100);

    // to calculate the note duration, take one second divided by the note type.
    //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
    int noteDuration = thisPitch / noteDurations[thisNote];

    // to distinguish the notes, set a minimum time between them.
    // the note's duration + 30% seems to work well:
    int pauseBetweenNotes = noteDuration / 1.30;
    tone(9, melody[thisNote], noteDuration);
    delay(pauseBetweenNotes);

    Serial.println(sensorReading);
    Serial.println(thisPitch);

    if (pauseBetweenNotes > 100) {
    noTone(9, melody[thisNote], noteDuration);
    }
  }
}