|Acoustics of the saxophone
Bb tenor saxophone
Notes are the written pitch.
This is the second note in the third register, meaning that it plays at the third impedance peak. It is also the second or third note in the altissimo or very high range. The weakness of the third peak (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 saxophone played using fingering for G#6.
For more explanation, see Introduction to saxophone acoustics.
You can hear G#6 played.