const int NOTE_A3  = 220;
const int NOTE_B3  = 247;
const int NOTE_C4  = 262;
const int NOTE_D4  = 294;
const int NOTE_E4  = 330;
const int NOTE_FS4 = 370;   
const int NOTE_G4  = 392;
const int NOTE_A4  = 440;
const int NOTE_B4  = 494;
const int NOTE_C5  = 523;
const int NOTE_D5  = 587;
const int NOTE_E5  = 659;

const int buzzerPin = 23;   
const int wholeNote = 2500;   

// ---------- BAIT 1 : nada ----------
int melodyBait[] = {
  // Indonesia tanah airku
  NOTE_B3, NOTE_C4, NOTE_D4, NOTE_B4, NOTE_B4, NOTE_A4, NOTE_A4, NOTE_G4, NOTE_D4,
  // Tanah tumpah darahku
  NOTE_D4, NOTE_D4, NOTE_E4, NOTE_D4, NOTE_C4, NOTE_B3, NOTE_A3,
  // Di sanalah aku berdiri
  NOTE_A3, NOTE_B3, NOTE_C4, NOTE_A4, NOTE_A4, NOTE_G4, NOTE_G4, NOTE_FS4, NOTE_E4,
  // Jadi pandu ibuku
  NOTE_D4, NOTE_D4, NOTE_FS4, NOTE_E4, NOTE_D4, NOTE_C4, NOTE_B3,
  // Indonesia kebangsaanku
  NOTE_B3, NOTE_C4, NOTE_D4, NOTE_B4, NOTE_B4, NOTE_A4, NOTE_A4, NOTE_G4, NOTE_D4,
  // Bangsa dan tanah airku
  NOTE_D4, NOTE_D4, NOTE_E4, NOTE_D4, NOTE_G4, NOTE_A4, NOTE_FS4, NOTE_E4,
  // Marilah kita berseru
  NOTE_E4, NOTE_E4, NOTE_C5, NOTE_C5, NOTE_B4, NOTE_A4, NOTE_D5, NOTE_G4,
  // Indonesia bersatu
  NOTE_FS4, NOTE_E4, NOTE_D4, NOTE_C5, NOTE_B4, NOTE_A4, NOTE_G4,
  // Hiduplah tanahku
  NOTE_D4, NOTE_D4, NOTE_E4, NOTE_C5, NOTE_C5, NOTE_C5,
  // Hiduplah negeriku
  NOTE_C5, NOTE_C5, NOTE_B4, NOTE_G4, NOTE_G4, NOTE_G4,
  // Bangsaku rakyatku semuanya
  NOTE_FS4, NOTE_G4, NOTE_A4, NOTE_D5, NOTE_D5, NOTE_D5, NOTE_C5, NOTE_C5, NOTE_B4, NOTE_G4,
  // Bangunlah jiwanya
  NOTE_D4, NOTE_D4, NOTE_E4, NOTE_C5, NOTE_C5, NOTE_C5,
  // Bangunlah badannya
  NOTE_C5, NOTE_C5, NOTE_B4, NOTE_G4, NOTE_G4, NOTE_G4,
  // Untuk Indonesia Raya
  NOTE_FS4, NOTE_G4, NOTE_A4, NOTE_D5, NOTE_D5, NOTE_B4, NOTE_A4, NOTE_G4
};

// ---------- BAIT 1 : durasi ----------
int durasiBait[] = {
  -8, 16, 4, -8, 16, 4, 4, 4, 2,          // Indonesia tanah airku
  4, 4, 4, 4, 4, 4, 2,                    // Tanah tumpah darahku
  -8, 16, 4, -8, 16, 4, 4, 4, 2,          // Di sanalah aku berdiri
  4, 4, 4, 4, 4, 4, 2,                    // Jadi pandu ibuku
  -8, 16, 4, -8, 16, 4, 4, 4, 2,          // Indonesia kebangsaanku
  4, 4, 4, 4, 4, 4, 8, -4,                // Bangsa dan tanah airku
  4, 4, 4, 4, 4, 4, 8, -4,                // Marilah kita berseru
  4, 4, 4, 4, 4, 4, 2,                    // Indonesia bersatu
  4, 8, 8, 4, 8, 8,                       // Hiduplah tanahku
  4, 8, 8, 4, 8, 8,                       // Hiduplah negeriku
  8, 8, 4, 4, 8, 8, 4, 8, 8, 2,           // Bangsaku rakyatku semuanya
  4, 8, 8, 4, 8, 8,                       // Bangunlah jiwanya
  4, 8, 8, 4, 8, 8,                       // Bangunlah badannya
  8, 8, 4, 4, 4, 4, 4, 2                  // Untuk Indonesia Raya
};

// ---------- REFF : nada ----------
int melodyReff[] = {
  // Indonesia Raya
  NOTE_G4, NOTE_G4, NOTE_C5, NOTE_E5, NOTE_E5, NOTE_E5,
  // Merdeka merdeka
  NOTE_E5, NOTE_E5, NOTE_D5, NOTE_B4, NOTE_B4, NOTE_B4,
  // Tanahku negeriku yang kucinta
  NOTE_D5, NOTE_D5, NOTE_C5, NOTE_A4, NOTE_A4, NOTE_A4, NOTE_D5, NOTE_C5, NOTE_B4, NOTE_G4,
  // Indonesia Raya
  NOTE_G4, NOTE_G4, NOTE_C5, NOTE_E5, NOTE_E5, NOTE_E5,
  // Merdeka merdeka
  NOTE_E5, NOTE_E5, NOTE_D5, NOTE_B4, NOTE_B4, NOTE_B4,
  // Hiduplah Indonesia Raya
  NOTE_D5, NOTE_D5, NOTE_D5, NOTE_C5, NOTE_B4, NOTE_A4, NOTE_B4, NOTE_A4, NOTE_G4
};

// ---------- REFF : durasi ----------
int durasiReff[] = {
  8, 8, 4, 4, 8, 8,                       // Indonesia Raya
  8, 8, 4, 4, 8, 8,                       // Merdeka merdeka
  4, 4, 4, 8, 8, 4, 8, 8, 8, -4,          // Tanahku negeriku yang kucinta
  8, 8, 4, 4, 8, 8,                       // Indonesia Raya
  8, 8, 4, 4, 8, 8,                       // Merdeka merdeka
  4, 4, 4, 4, 4, 8, 8, 8, -4              // Hiduplah Indonesia Raya
};

// ---------- FUNGSI: memainkan satu rangkaian nada ----------
void mainkanLagu(int nada[], int durasi[], int jumlahNada) {

  for (int i = 0; i < jumlahNada; i++) {
    int noteDuration;
    if (durasi[i] > 0) {
      noteDuration = wholeNote / durasi[i];            // not biasa
    } else {
      noteDuration = wholeNote / (-durasi[i]) * 1.5;   // not bertitik
    }

    // tone() tanpa parameter durasi, supaya hasilnya sama di semua board
    tone(buzzerPin, nada[i]);                          // mulai membunyikan nada
    delay(noteDuration * 0.9);                         // tahan 90% durasi
    noTone(buzzerPin);                                 // berhenti ketika nada selesai dibunyikan
    delay(noteDuration * 0.1);                         // jeda singkat antarnada
  }
}

void setup() {
  pinMode(buzzerPin, OUTPUT);

  // bait 1
  mainkanLagu(melodyBait, durasiBait, sizeof(melodyBait) / sizeof(melodyBait[0]));

  // reff dinyanyikan 2 kali
  for (int ulang = 0; ulang < 2; ulang++) {
    mainkanLagu(melodyReff, durasiReff, sizeof(melodyReff) / sizeof(melodyReff[0]));
  }
}

void loop() {
}