classical flute flared foot

D6

Impedance

Acoustic and Fingering Schematic a covered tone hole or key pressed an uncovered tone hole or key not pressed a partly covered hole Details in fingering legend. Non-specialist introduction to acoustic impedance Non-specialist introduction to flute acoustics

This fingering is comparable to that for G4 except for the open register hole. This creates a pressure node (or flow antinode) about two thirds of the way along the pipe, and thus allows D6 but not G4 or G5. Comparing this with the G4 impedance spectrum, we see that the third minimum is little changed. The second is shallower and unplayable. The first minimum plays C5. Both C5 & D6 may be played simultaneously as a multiphonic.

Sound

Sound spectrum of a classical flute with a flared foot played using fingering for D6.

Sound Clip

You can hear D6 played by Geoffrey Collins.