Bassist, composer, and producer who was one of the session musicians on Bob Dylan's seminal album Highway 61 Revisited and has worked as part of his backing band.
He entered the New York jazz scene in the early 1960s, playing with Felix Pappalardi and Andy Kulberg.
He worked on the album Soft Parade by The Doors.
He started 17th Street Records with his wife Bonnie.
He played on Bitches Brew and Big Fun, two influential albums by Miles Davis.