Performers include: Gil Evans, George Russell, Johnny Carisi and Rod Levitt.

A lot of unusual music appears on this Bluebird CD. Altoist Hal McKusick (with arrangmeents contributed by George Russell and Gil Evans) performs five numbers (including a version of "Blues for Pablo" that was cut a year before Miles Davis's recording) with a variety of musicians including trumpeter Art Farmer and trombonist Jimmy Cleveland. Arranger John Carisi (heard here on trumpet) interprets seven previously unreleased numbers with an octet and trombonist Rod Levitt performs five of his arrangements with his own advanced octet. Although these performances would have little influence on future developments in jazz (the free jazz movement of the 1960s overshadowed the trend toward using elements of modern classical music in charts), the music still sound quite fresh and unpredictable today.