Home / Forums / General melodica discussion / I need help / Reply To: I need help Reply To: I need help September 13, 2017 at 1:43 pm #9321 Daren BanarsëKeymaster Hi Chelsea, melodicas come in all shapes and sizes! You have a 32 note melodica. They’re also quite common. Is it a Yamaha P37D? If not, what model is it? I’ll tell you where to write the letters on the keys.