1950s in music own unique style and rockabilly had largely disappeared from popular music, although its influences would remain into the future. Bebop, Hard bop, Cool jazz and the Blues gained popularity during the 1950s while prominent Jazz musicians who came into prominence in these genres included Lester Young, Ben Webster, Charlie Parker, Dizzy Gillespie, Miles Davis, John Coltrane, Thelonious Monk, Charles Mingus, Art Tatum, Bill Evans, Ahmad Jamal, Oscar Peterson, Gil Evans, Gerry Mulligan, Cannonball Adderley, Stan Getz, Chet Baker, Dave Brubeck, Art Blakey, Max Roach, the Miles Davis Quintet, the Modern Jazz Quartet, Ella Fitzgerald, Ray Charles, Sarah Vaughan, Dinah Washington,
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