Charles Mingus Jr. was an American jazz upright bassist, composer, bandleader, pianist, and author. A major proponent of collective improvisation, he is considered to be one of the greatest jazz musicians and composers in history, with a career spanning three decades and collaborations with other jazz greats such as Duke Ellington, Charlie Parker, Max Roach, and Eric Dolphy. Mingus' work ranged from advanced bebop and avant-garde jazz with small and midsize ensembles, to pioneering the post-bop style on seminal recordings like Pithecanthropus Erectus (1956) and Mingus Ah Um (1959), and progressive big band experiments such as The Black Saint and the Sinner Lady (1963).

William Marcel "Buddy" Collette was an American jazz flutist, saxophonist, and clarinetist. He was a founding member of the Chico Hamilton Quintet.