Calm Radio's Be Bop channel has all the biggest names in jazz like Charlie Parker, Cannonball Adderley, Art Blakey, Horace Silver and many more. Bebop or bop is a style of jazz characterized by instrumental virtuosity and improvisation based on the combination of harmonic structure and melody. It was developed in the early and mid-1940s. It first surfaced in musicians' argot some time during the first two years of American involvement in the Second World War. This style of jazz ultimately became synonymous with modern jazz, as either category reached a certain final maturity in the 1960s.