This flute is basically a pan flute design. Each resonant tube is closed at the end and tuned to the appropriate lengths for a Gm chord (G Bb D G). Blowing more than one of the notes will create the chord. Although this is a finished flute it is actually a preliminary test part of a larger project to create a full Gm harmonic flute. My grandson loves it so I thought I would share. No fingering is required and no mastering an embouchure since each tube has its own mouthpiece vent.