uint32_t musicData[] = { // Frequency ch0, Duty ch0, Frequency ch2, Duty ch2, Frequency ch4, Duty ch4, Frequency ch6, Duty ch6,
  220, 127,   0, 127,   0, 127,   0, 127,
  220, 127,   0, 127,   0, 127,   0, 127,

  220, 127,   0, 127,   0, 127,   0, 127,
  220, 127,   0, 127,   0, 127,   0, 127,

  440, 127,   0, 127,   0, 127,   0, 127,
  440, 127,   0, 127,   0, 127,   0, 127,
  440, 127,   0, 127,   0, 127,   0, 127,
  440, 127,   0, 127,   0, 127,   0, 127,

  220, 127,   0, 127,   0, 127,   0, 127,
  220, 127,   0, 127,   0, 127,   0, 127,

  220, 127,   0, 127,   0, 127,   0, 127,
  220, 127,   0, 127,   0, 127,   0, 127,

  220, 127,   0, 127,   0, 127,   0, 127,
    0, 127,   0, 127,   0, 127,   0, 127,

  220, 127,   0, 127,   0, 127,   0, 127,
    0, 127,   0, 127,   0, 127,   0, 127,
};

double tickRateHz = 10;
uint32_t idx = 0;

void setup() {
  ledcSetup(0, 0, 8);
  ledcSetup(2, 0, 8);
  ledcSetup(4, 0, 8);
  ledcSetup(6, 0, 8);

  ledcAttachPin(16, 0);
  ledcAttachPin(17, 2);
  ledcAttachPin(5, 4);
  ledcAttachPin(18, 6);

  // analogWrite(5, 5);
  // analogWriteFrequency(440);

  ledcWrite(0, 10);
  //ledcWrite(2, 64);
  //ledcWrite(4, 127);
  // ledcWrite(6, 245);

  ledcWriteNote(0, NOTE_C, 4); // Cmaj7
  ledcWriteNote(2, NOTE_E, 4);
  ledcWriteNote(4, NOTE_G, 4);
  // ledcWriteNote(6, NOTE_B, 4);
}

uint32_t tickRateMicros = 1000000 / tickRateHz;

void loop() {/*
  if (idx >= (sizeof(musicData) / sizeof(uint32_t))) idx = 0;

  ledcWrite(0, musicData[idx + 1]);
  ledcWriteTone(0, musicData[idx]);
  ledcWrite(2, musicData[idx + 3]);
  ledcWriteTone(2, musicData[idx + 2]);
  ledcWrite(4, musicData[idx + 5]);
  ledcWriteTone(4, musicData[idx + 4]);
  ledcWrite(6, musicData[idx + 7]);
  ledcWriteTone(6, musicData[idx + 6]);

  idx += 4;

  delayMicroseconds(tickRateMicros);*/

  ledcWriteNote(0, NOTE_E, 4);
  ledcWriteNote(2, NOTE_G, 4);
  ledcWriteNote(4, NOTE_B, 4);

  delay(433);
  
  ledcWriteNote(4, NOTE_C, 5);

  delay(433);
  
  ledcWriteNote(4, NOTE_D, 5);

  delay(433);
  
  ledcWriteNote(4, NOTE_E, 5);

  delay(433);
  
  ledcWriteNote(0, NOTE_A, 4);
  ledcWriteNote(2, NOTE_C, 5);

  delay(2400);

  ledcWriteNote(4, NOTE_F, 5);

  delay(600);

  ledcWriteNote(4, NOTE_E, 5);
  
  delay(200);
  
  ledcWriteNote(0, NOTE_G, 4);
  ledcWriteNote(2, NOTE_B, 4);
  
  delay(1600);
  
  ledcWriteNote(4, NOTE_C, 5);
  
  delay(800);
  
  ledcWriteNote(4, NOTE_A, 4);

  delay(800);
  
  ledcWriteNote(0, NOTE_E, 4);
  ledcWriteNote(2, NOTE_G, 4);
  ledcWriteNote(4, NOTE_B, 4);

  delay(3200);
  
  ledcWriteNote(4, NOTE_C, 5);

  delay(1600);
}