       #endif
     }
 
-    // play the track on the music maker shield and retrieve a return value 
+    // play the track on the music maker shield and retrieve the nextTrackToPlay from global variable (it is set by playTrack())
     //        -1  errors trying to play the file (like file not found)
     //         0  success - the file was played
     //     1-127  any positive number for the next track to play

}
#endif

//
//        MM      MM   PPPPPP   33333
//        MMMM  MMMM  PP    PP      33

    pinMode(iRRemotePin, INPUT);     // connects to the output port of the remote control (decoded values for each button in function playTrack())
  #endif
  
    
  // DEFINE OUPUT PINs
  #ifdef OPRLIGHT
    pinMode(infoLedPin, OUTPUT);     // connect to blue LED
  #endif
  pinMode(warnLedPin, OUTPUT);     // connect to orange LED
  pinMode(errorLedPin, OUTPUT);    // connect to a red LED

  
  // INITIALIZE THE MUSIC PLAYER
  if (! musicPlayer.begin()) {
    #ifdef DEBUG
      Serial.println(F("VS1053 Not found"));
