Home / Forums / General melodica discussion / Pianica P-37D & Thomann DP-25 / Reply To: Pianica P-37D & Thomann DP-25 Reply To: Pianica P-37D & Thomann DP-25 April 11, 2020 at 5:16 am #11258 Lionel AlbertParticipant There is a lot of water in the tube, without it, the water comes into the instrument but the sound becomes warmer.