Anthony Braxton is an American experimental composer, educator, music theorist, improviser and multi-instrumentalist who is best known for playing saxophones, particularly the alto. Braxton grew up on the South Side of Chicago, Illinois, and was a key early member of the Association for the Advancement of Creative Musicians. He received great acclaim for his 1969 double-LP record For Alto, the first full-length album of solo saxophone music.

The alto saxophone is a member of the saxophone family of woodwind instruments. Saxophones were invented by Belgian instrument designer Adolphe Sax in the 1840s and patented in 1846. The alto saxophone is pitched in the key of E♭, smaller than the B♭ tenor but larger than the B♭ soprano. It is the most common saxophone and is used in popular music, concert bands, chamber music, solo repertoire, military bands, marching bands, pep bands, carnatic music, and jazz.