Soprano Saxophone

The Soprano Saxophone (ソプラノサックス) is the third smallest instrument in the saxophone family. It is smaller than the alto saxophone and is pitched one octave higher than the tenor saxophone. The soprano sax is pitched in the key of B♭, and written as a transposing instrument in the treble clef, sounding an octave and a major second lower than the written pitch.

As portrayed in Sound! Euphonium
There is one student, Kiriko Miya, who plays the soprano saxophone during Kitauji's performance of "Takarajima" at the station concert. However, under normal circumstances, she is an alto saxophone player.

Trivia

 * Soprano saxophones are rarely seen in concert bands.
 * Soprano saxophones have a similar tone to oboes, and thus are sometimes used as a replacement for the latter.
 * Soprano saxophones are also arguably one of the most difficult saxophones to play and pick up for beginners, since it is difficult to play in tune and in the upper register.
 * Soprano saxophones in Sound! Euphonium are based on Yamaha YSS-475/YSS-475II models.