deck the halls - final

int Piezo = 5;
int length = 38;
char notes[] = "gfedcdecdefdedcBcc gfedcdecdefdedcBcc";
int beats[] = {3,1,2,2,2,2,2,2,1,1,1,1,3,1,2,2,2,2,4,3,1,2,2,2,2,2,2,1,1,1,1,3,1,2,2,2,2,4};

int tempo = 200;
void playTone(int tone, int duration) {
  for (long i = 0; i < duration * 1000L; i += tone * 2) {
    digitalWrite(Piezo, HIGH);
    delayMicroseconds(tone);
    digitalWrite(Piezo, LOW);
    delayMicroseconds(tone);
  }
}
void playNote(char note, int duration) {
  char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C','B'};
  int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956, 27.5};

  char names_sharp[] = { 'c', 'd', 'f', 'g', 'a', 'C', 'D', 'F', 'G', 'A' };
  int tones_sharp[] = { 1804, 1607, 1351, 1204, 1073, 902, 804, 676, 602, 536 };

  // play the tone corresponding to the note name
  for (int i = 0; i < 8; i++) {
    if (names[i] == note) {
      playTone(tones[i], duration);
    }
  }
}
void setup() {
  pinMode(Piezo, OUTPUT);
}
void loop() {
  for (int i = 0; i < length; i++) {
    if (notes[i] == ' ') {
      delay(beats[i] * tempo); // rest
    } else {
      playNote(notes[i], beats[i] * tempo);
    }

    // pause between notes
    delay(tempo / 310);
  }
}