From Wikipedia, the free encyclopedia
The alto saxophone is a member of the saxophone family of woodwind instruments invented by Belgian instrument designer Adolphe Sax in 1841. It is smaller than the tenor but larger than the soprano, and is the type most used in classical compositions. The alto and tenor are the most common types of saxophone.

Transposition
The alto saxophone is an E transposing instrument and reads the treble clef. A written C-natural sounds as the concert E a major sixth lower.

Range
The range of the alto saxophone is from concert D3 to concert A5. As with most types of saxophones, the standard written range is B3 to F6. Above that, the altissimo register begins at F and extends upwards. The saxophone's altissimo register is more difficult to control than that of other woodwinds and is usually on