Home / Forums / General melodica discussion / Sound holes on the back / Reply To: Sound holes on the back Reply To: Sound holes on the back March 10, 2014 at 11:49 pm #1963 Alan BrintonParticipant While I have it apart, I think I’ll tune it and check the reed gapping, since the factory tuning wasn’t so hot. The three screws you see on the cover of the reed chamber are the same as the four on the outer corners — no tiny screws on this one.