Pharoah Sanders was an American jazz saxophonist. Known for his overblowing, harmonic, and multiphonic techniques on the saxophone, as well as his use of "sheets of sound", Sanders played a prominent role in the development of free jazz and spiritual jazz through his work as a member of John Coltrane's groups in the mid-1960s, and later through his solo work. He released more than thirty albums as a leader and collaborated extensively with vocalist Leon Thomas and pianist Alice Coltrane, among many others. Fellow saxophonist Ornette Coleman once described him as "probably the best tenor player in the world".

Free jazz or Free Form in the early- to mid-1970s is a style of avant-garde jazz or an experimental approach to jazz improvisation that developed in the late 1950s and early 1960s when musicians attempted to change or break down jazz conventions, such as regular tempos, tones, and chord changes. Musicians during this period believed that the bebop and modal jazz that had been played before them was too limiting, and became preoccupied with creating something new. The term "free jazz" was drawn from the 1960 Ornette Coleman recording Free Jazz: A Collective Improvisation. Europeans tend to favor the term "free improvisation". Others have used "modern jazz", "creative music", and "art music".