(Single-reeded aerophone with keys)
|Developed||28 June 1846|
In B♭: sounds a minor seventh higher than written.
Military band family:
The sopranissimo or soprillo saxophone is the smallest member of the saxophone family. It is pitched in B♭, one octave above the soprano saxophone. Because of the difficulties in building such a small instrument--the soprillo is 30 cm (12 in) long, 33 cm (13 in) with the mouthpiece--it is only recently[when?] that a true sopranissimo saxophone has been produced. The keywork only extends to a written E♭6 (sounding D♭7), rather than F, F♯, or sometimes G, like most saxophones; and the upper octave key has to be placed on the mouthpiece.
The extremely small mouthpiece requires a small and focused embouchure, making the soprillo difficult to play, particularly in its upper register. There is very little market demand for soprillos, reducing the economy of scale and making the soprillo more expensive than more common saxophones like the alto or tenor.