Cool jazz is a type of jazz that is understated and subtle, and integrates elements of classical music. It is sometimes referred to as West Coast jazz or West Coast cool, as it was primarily practiced by musicians in the Los Angeles area; however, its popularity and practice was by no means limited to California. The Claude Thornhill Orchestra and Lennie Tristano first recorded cool jazz in the late 1940s. Thornhill's most popular song "Snowfall" is still played today.
Some other cool jazz artists:
Samples