1940s in jazz figures as baritone saxophonist Lars Gullin and pianist Bengt Hallberg. The theoretical underpinnings of cool jazz were set out by the blind Chicago pianist Lennie Tristano, and its influence stretches into such later developments as Bossa nova, modal jazz, and even free jazz. See also the list of cool jazz and West Coast musicians for further detail. The American Federation of Musicians recording ban, called by James Petrillo, continued through 1943. 1940s in jazz In the early 1940s in jazz, bebop emerged, led by Charlie Parker, Dizzy Gillespie, Thelonious Monk and others. It helped to shift jazz from danceable popular
The Genius of Charlie Parker Vol. 2" [Savoy MG 12009] and "The Charlie Parker Story" [Savoy MG 12079]) completing the reissue of the previously released master takes, and the original issue of most of the unreleased takes from these seven sessions. Parker's entire Savoy ouvre was finally issued on "Charlie Parker: The Complete Savoy Studio Sessions" in 1978. The master take of "Koko", included here, is controversial in that it is unclear who, precisely, plays trumpet and\or piano on the track. The liner notes credit Miles Davis with trumpet for the session, but also credit Dizzy Gillespie with both trumpet and piano. Several sources claim