|Acoustics of the saxophone|
Bb soprano saxophone
Notes are the written pitch.
This is the first note in the third register, meaning that it plays at the third impedance peak. It is also the first 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.
Although this is the lowest note in the altissimo range, it is one of the hardest, because of the weakness of this peak. Compare with G#6, which has a stronger third peak.
Sound spectrum of a Bb soprano saxophone played using fingering for G6.
For more explanation, see Introduction to saxophone acoustics.
You can hear G6 played.