|Acoustics of the saxophone|
Bb soprano saxophone
Notes are the written pitch.
This is the fourth note in the second register. It differs from F4 (the corresponding note in the first register) in that it uses a register hole. This causes a leak in the bore that weakens the first impedance peak, but has little affect on higher peaks – see register hole for an explanation, and compare with F4, whose impedance spectrum is almost identical except for the first peak. Above about 1 kHz, the curve is irregular: see the discussion in cut-off frequency.
Compare with the impedance spectrum for a tenor sax on written F5: same fingering but sounding one octave lower.
Sound spectrum of a Bb soprano saxophone played using fingering for F5.
For more explanation, see Introduction to saxophone acoustics.
You can hear F5 played.