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? December 12, 2016 at 8:08 pm #7989 Aaron LevitzParticipant In my experience, they all go out of tune eventually, no matter what condition they arrive in. Expect you’ll have to make some adjustments sooner or later.