    }
  }
  
- if((rx.header >> 4) == 2) { // channel 3 (channel 1 has value 0)
+ if((rx.header >> 4) == MidiChannel) { // channel 3 (channel 1 has value 0)
   if((rx.header & 0b1111) == 0b1011) { // control change
     if(rx.byte1 == 80) { // CupLed
       digitalWrite(CupLed, rx.byte2 >> 6); // 0 >> 6 = 0 and 127 >> 6 = 1

   }
 }
 
 if((rx.header >> 4) == 2) { // channel 3 (channel 1 has value 0)
  if((rx.header & 0b1111) == 0b1011) { // control change
    if(rx.byte1 == 74) { // PlusLed
      digitalWrite(PlusLed, rx.byte2 >> 6); // 0 >> 6 = 0 and 127 >> 6 = 1

   }
 }
 
 if((rx.header >> 4) == MidiChannel) { // channel 3 (channel 1 has value 0)
  if((rx.header & 0b1111) == 0b1011) { // control change
    if(rx.byte1 == 84) { // SnareLed
      digitalWrite(SnareLed, rx.byte2 >> 6); // 0 >> 6 = 0 and 127 >> 6 = 1
