|Acoustics of the saxophone|
Bb soprano saxophone
Notes are the written pitch.
This is the fifth note in the altissimo or very high range and the fingering shown here for playing it is the same as that for D5.
The weakness of peaks in this range (due to the relatively large cone angle of the saxophone) explains why notes in this range are hard to play and require the player to assist the weak impedance peak of the bore with a strong impedance peak of the vocal tract. See this page for an explanation and some interesting results.
Sound spectrum of a Bb soprano saxophone played using fingering for B6.
For more explanation, see Introduction to saxophone acoustics.
You can hear B6 played.