Keith Graham Tippetts, known professionally as Keith Tippett, was a British jazz pianist and composer. According to AllMusic, Tippett's career "...spanned jazz-rock, progressive rock, improvised and contemporary music, as well as modern jazz for more than half-a-century". He held "an unparallelled place in British contemporary music," and was known for "his unique approach to improvisation". Tippett appeared and recorded in many settings, including a duet with Stan Tracey, duets with his wife Julie Tippetts, solo performances, and as a bandleader.

Stanley William Tracey was a British jazz pianist and composer, whose most important influences were Duke Ellington and Thelonious Monk. Tracey's best known recording is the 1965 album Jazz Suite Inspired by Dylan Thomas's "Under Milk Wood", which is based on the BBC radio drama Under Milk Wood, by Dylan Thomas.