Home / Forums / Buying a melodica / What 37 keys Melodica should I buy? / Reply To: What 37 keys Melodica should I buy? Reply To: What 37 keys Melodica should I buy? August 9, 2023 at 2:41 am #14996 AnonymousInactive Concertina is a pretty challenging instrument to learn. It just makes sense to play the same notes on a familiar instrument.