In 1948, Davis formed a short-lived group with Gerry Mulligan, J.J. Johnson, Kenny Clarke, and Lee Konitz with arrangements that juxtaposed the flexible, improvisatory nature of bebop with a thickly textured orchestral sound. Tracks released by the group in 1949-50 changed the course of modern jazz and paved the way for the West Coast styles of the 1950s.
Davis explored the trumpet’s middle register, experimenting with harmonies and rhythms and varying the phrasing of his improvisations. With the occasional exception of multi-note flurries, his melodic style was direct and un-ornamented, based on quarter notes and rich with inflections. The deliberation, pacing, and lyricism in his improvisations were striking.
Source: Encyclopaedia Britannica