Home / Forums / Buying a melodica / Yamaha P37D vs Suzuki M37 / Reply To: Yamaha P37D vs Suzuki M37 Reply To: Yamaha P37D vs Suzuki M37 August 15, 2017 at 8:38 pm #9151 Paul DurhamParticipant Oliver. more users are happy with the factory tuning o the Yamaha Pianicas. The tuning will also last longer in most cases. Having to do less repairs and maintenance is what I mean by longer service. How you play and what you play will determine whether upgrading is worth the cost. Also let me say, I did not comment on mothpiece as I always use the tube.