Albert Ayler (July 13, 1936 – November 1970) was an American avant-garde jazz saxophonist, singer and composer. Albert Ayler was the most primal of the free jazz musicians of the 1960s; John Litweiler wrote that "never before or since has there been such naked aggression in jazz" He possessed a deep blistering tone—achieved by using the stiffest plastic reeds on his tenor saxophone that he could find—and used a broad, pathos-filled vibrato that came right out of church music.

His trio and quartet records of 1964, like Spiritual Unity and The Hilversum Session, show him advancing the improvisational notions of John Coltrane and Ornette Coleman into abstract realms where timbre, not harmony and melody, are the music's backbone. His ecstatic music of 1965 and 1966, like "Spirits Rejoice" and "Truth is Marching In" has been compared by critics to the sound of a Salvation Army brass band, and involved simple, march-like themes which alternated with wild group improvisations and took jazz back to its pre-Louis Armstrong roots.

Albert Ayler was the most primal of the free jazz musicians of the 19 60s . He possessed a deep blistering tone—achieved by using the stiffest plastic reeds he could find on his tenor saxophone—and a broad, pathos-filled vibrato that came right out of church music. His trio and quartet records of 1964, like Spiritual Unity and The Hilversum Sessions, show him advancing the improvisational notions of John Coltrane and Ornette Coleman into abstract realms where timbre, not harmony and melody,