Home / Forums / Buying a melodica / Yamaha Pianica P-37E – My Report / Reply To: Yamaha Pianica P-37E – My Report Reply To: Yamaha Pianica P-37E – My Report December 9, 2020 at 12:40 am #11881 DarenKeymaster Reeds vary in pitch a lot on melodicas, so it’s nothing to worry about. Also, they get wet every time you play, and then dry out