classical flute C foot

C#4

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

Although there is only one tone hole open, its effect on the regularity of the impedance minima is evident , and it appears at lower frequencies than for C#4 on the Boehm flute.

Sound

Sound spectrum of a classical flute with a C foot played using fingering for C#4.

Sound Clip

You can hear C#4 played by Geoffrey Collins.