Home / Forums / Melodica construction, repair and maintenance / Material test on Yamaha P37D / Reply To: Material test on Yamaha P37D Reply To: Material test on Yamaha P37D May 11, 2015 at 5:19 pm #5014 Alan BrintonParticipant I don’t think we have discussed the tactile aesthetics of vibration here (except for a brief exchange in which Melodic-Me warned me about the dental implications of rattling one’s teeth on the mouthpiece).