The Cool jazz reference article from the English Wikipedia on 24-Apr-2004
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Cool jazz

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Cool jazz is a type of jazz that is understated and subtle. West Coast jazz (often considered an invalid jazz type as it encompasses more than the West Coast of the USA) is often part of cool jazz. 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:

Jazz | Jazz genres
Bebop - Dixieland - Cool jazz - Free jazz - Hard bop - Modal jazz
Acid jazz - Jazz fusion - Jazz rap - Nu jazz