Home / Forums / Melodica construction, repair and maintenance / Suzuki B24 Bass Melodion – Gapping / Reply To: Suzuki B24 Bass Melodion – Gapping Reply To: Suzuki B24 Bass Melodion – Gapping August 6, 2018 at 3:31 pm #10141 KevinParticipant “But the bass melodicas require the bladder.” Can you elaborate on this Alan? Have we discussed this in the past? If So I’ve totally forgotten. There’s a bladder on my M-37C and for the life of me I can see no use for it.” I’ve thought of tearing it off and replacing with a duct taped sheet of plastic Because I find the M-37C difficult to sound quickly when playing softly. The only thing I can see is that it protects the reeds from being damaged from a strong gust of air. Such as when you accidentally depress a key when blowing out the spit valve.