Home / Forums / General melodica discussion / Melodica Tubing Upgrades–Photo / Reply To: Melodica Tubing Upgrades–Photo Reply To: Melodica Tubing Upgrades–Photo May 16, 2017 at 1:48 pm #8897 Alan BrintonParticipant I would think that a larger diameter of tubing of these lengths would require more air to be moved while playing. But this may be a scientifically flawed intuition.