Hard Bop
Hard bop is a subgenre of jazz that is an extension of bebop (or "bop") 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.
David H. Rosenthal contends in his book Hard Bop that the genre is, to a large degree, the n…