Cool jazz is a style that originated in the U.S. in the late 1940’s. The genre is a contrast to the Bebop style that preceded it. Its main characteristics are focus on melody and relaxed tempo. Classical influence is common as well. Instrumentation can vary, but common instruments are trumpet, piano, upright bass, drums, saxophone, and even some of the more uncommon instruments for jazz like the french horn. Some of the most prominent cool jazz musicians included Miles Davis, Gil Evans, Dave Brubeck, Chet Baker, and Charles Mingus.