In parallel with the emergence of bebop in the medium of jazz music is developing a new genre – progressive jazz, or simply progressive. The main difference in this genre is the desire to move away from a frozen cliche Big Bend and obsolete, old tired tricks Sc. Symphony Jazz, introduced in 1920 by Paul Uaytmenom. Unlike bopperov, creators Progressive sought a radical rejection of the jazz tradition, established at the time. Rather, they sought to updating and improving the swing-phrase models, introducing the practice of composition latest European symphony of tonality and harmony. The largest contribution to the development of concepts of "progressive" introduced pianist and conductor Stan Kenton. From his early work actually begins progressive jazz beginning of 1940.
The sound of instrumental music, performed by his first orchestra was close to Rachmaninoff, and the compositions bear the features Late Romanticism. However, the genre that was closest to the Symphony Jazz. Later, during the creation of the famous series of his album Artistry, elements of jazz had ceased to play the role of a color, and has organically woven into the musical material. Along with Kenton, the credit for this belongs to and its the best music arranger Pete Rugolo, a disciple of Darius Milhaud. Modern (for the year) symphonic sound, the specific technique staccato in the game saxophones, bold harmonies, frequent seconds and blocks, along with and jazz rhythmic pulsation – are the distinguishing features of music that Stan Kenton for many years to come in jazz history as one of the innovators who have found a common platform for European culture and the symphonic elements of bebop, especially noticeable in the plays, where the solo instrumentalists as opposed to the sounds of the rest of the orchestra. It is also noteworthy and great attention paid by Kenton in his compositions, improvisational soloists parties, including the world-famous drummer Shelly Mayne, bassist Ed Safransky, trombonist Kai Winding, June Christy, one of the best jazz singers of those years. Loyalty to the chosen genre, Stan Kenton retained throughout his career. In addition to Stan Kenton, his contribution to the development of the genre have also made interesting arrangers and instrumentalists Boyd Ryburn and Gil Evans. A kind of apotheosis of progressive development, along with the previously mentioned series Artistry can be considered and a series of albums recorded with big band Gil Evans with Miles Davis' ensemble in 1950-1960's, for example "Miles ahead," "Porgy and Bess" and "Spanish paintings. Shortly before his death Miles Davis has again appealed to this genre by writing the old Gil Evans big band with Quincy Jones.