const int buzzerPin = 9;
int inpin = 2;

const int songLengthAmazingGrace = 33;

char notesAmazingGrace[] = "gCecedcaggCecedgegecegacggCecedc ";

int beatsAmazingGrace[] = {2, 4, 1, 1, 4, 2, 4, 2, 4, 2, 4, 1, 1, 4, 2, 10, 2, 4, 1, 1, 4, 2, 4, 2, 4, 2, 4, 1, 1, 4, 2, 8, 8};

int tempo = 300;

void setup() {
  pinMode(buzzerPin, OUTPUT);
  pinMode(inpin, INPUT);
}

void loop() {
  if (digitalRead(inpin) == HIGH) {
    play_music();
  }
}

void play_music() {
  int i, duration;

  for (i = 0; i < songLengthAmazingGrace; i++) {
    duration = beatsAmazingGrace[i] * tempo;

    if (notesAmazingGrace[i] == ' ') {
      delay(duration);
    } else {
      tone(buzzerPin, frequency(notesAmazingGrace[i]), duration);
      delay(duration);
    }
    delay(tempo / 10);
  }
}

int frequency(char note) {
  int i;
  const int numNotes = 14;

  char names[] = {'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C', 'D', 'E', 'F', 'G', 'A', 'B'};
  // Adjusted frequencies for a different pitch
  int frequencies[] = {262, 294, 330, 349, 392, 440, 494, 523, 587, 659, 698, 784, 880, 988};

  for (i = 0; i < numNotes; i++) {
    if (names[i] == note) {
      return (frequencies[i]);
    }
  }

  return (0);
}