#define MAX_MIDI_MESSAGES 6
#define CHANNELS 3
unsigned long previousMillis = 0;
int buffer_index = 0;
int buffer[CHANNELS][3];

int eventFlag = 0;

int midiFile[MAX_MIDI_MESSAGES][4] = {{1, 0, 100, 0}, {1, 1, 100, 0}, {1, 2, 100, 0}, {0, 0, 64, 694}, {0, 1, 64, 0}, {0, 2, 64, 0}};

void setup() {
  Serial.begin(9600);
  // put your setup code here, to run once:
}

void loop() {
  for (int i = 0; i < MAX_MIDI_MESSAGES; i++) {
    int note_on = midiFile[i][0];
    int channel = midiFile[i][1];
    int value = midiFile[i][2];
    int time = midiFile[i][3];
    if (i == 0) {
      buffer[buffer_index][0] = channel;
      if (note_on) {
        buffer[buffer_index][1] = value;
      } else {
        buffer[buffer_index][1] = 0;
      }
      buffer[buffer_index][2] = time;
    } else if(time == 0) {
         
    } else {
      delay(time);
      for(int pin = 0; pin < CHANNELS; pin ++ ) {
        analogWrite(buffer[pin][0 + 2], buffer[pin][1]);
      }
    }
  }
}