Steve Swallow is an American jazz bassist and composer, known for his collaborations with Jimmy Giuffre, Gary Burton, and Carla Bley. He was one of the first jazz double bassists to switch entirely to electric bass guitar.

James Peter Giuffre was an American jazz clarinetist, saxophonist, composer, and arranger. He is known for developing forms of jazz which allowed for free interplay between the musicians, anticipating forms of free improvisation.