|Acoustics of the saxophone
Bb tenor saxophone
Notes are the written pitch.
This is the twelfth note in the second register. It differs from C#5 (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 C#5, 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 soprano sax on written C#6: same fingering but sounding one octave higher.
Sound spectrum of a Bb tenor saxophone played using fingering for C#6.
For more explanation, see Introduction to saxophone acoustics.
You can hear C#6 played.