Donaldson Toussaint L'Ouverture Byrd II was an American jazz and rhythm & blues trumpeter and vocalist. A sideman for many other jazz musicians of his generation, Byrd was one of the few hard bop musicians who successfully explored funk and soul while remaining a jazz artist. As a bandleader, Byrd was an influence on the early career of Herbie Hancock and many others.

Hard bop is a subgenre of jazz that is an extension of bebop music. Journalists and record companies began using the term in the mid-1950s to describe a new current within jazz that incorporated influences from rhythm and blues, gospel music, and blues, especially in saxophone and piano playing.