Matt was asked to design a new tuning for a customer. He worked with it until he came up with something quite extraordinary-- a distinctive Middle Eastern sound. Everyone who hears it wants one. The flute not only has a new tuning but also a new shape and a new fingering.. It features a flat-bottomed block (groove in flute) .  Just as with the pentatonic flute the notes of this flute all harmonize with each other in a mysterious sounding Middle Eastern sort of way.