Home / Forums / Melodica construction, repair and maintenance / Reed Gapping Video / Reply To: Reed Gapping Video Reply To: Reed Gapping Video October 17, 2015 at 3:57 am #6045 LowboyParticipant Dang Alan, I thought you widened the gap to make the reed more responsive. That could explain why when I adjust the gaps, my melodicas go out of tune. Lowboy