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
Charlie Parker on Dial material from 1948, including a session with Tadd Dameron's Orchestra, featuring performances by tenor saxophonists Allen Eager and Wardell Gray. The first volume features several sessions. In one, Parker and Dizzy Gillespie perform "Diggin' Diz". In another, described by Yanow as "superior", Parker and Miles Davis on trumpet lead a West Coast septet through several Parker standards, with variant takes. The final session on the album features Parker in performance with a Howard McGhee-led quintet where, according to Yanow, Parker's performance is seriously hampered by his poor physical condition. This volume features the first session, including alternate takes, that Parker