Carla Bley was an American jazz composer, pianist, organist, and bandleader. An important figure in the free jazz movement of the 1960s, she was perhaps best known for her jazz opera Escalator over the Hill, as well as a book of compositions that have been performed by many other artists, including Gary Burton, Jimmy Giuffre, George Russell, Art Farmer, Robert Wyatt, John Scofield, and her ex-husband Paul Bley. She was a pioneer in the development of independent artist-owned record labels, and recorded over two dozen albums between 1966 and 2019.

Gary Burton is an American jazz vibraphonist, composer, and educator. Burton developed a pianistic style of four-mallet technique as an alternative to the prevailing two-mallet technique. This approach caused him to be heralded as an innovator, and his sound and technique are widely imitated. He is also known for pioneering fusion jazz and popularizing the duet format in jazz, as well as being a major figure in music education from his 30 years teaching at the Berklee College of Music.