Joni Mitchell

Joni's Jazz, a celebration of Joni Mitchell's deep affinity with jazz, will be released as a boxed set and on digital services on Sep. 5. A previously unreleased demo version of "Be Cool" from 1980 has been released as a single today.

'Rhapsody on a Theme by Joni' draws inspiration partially from Joni Mitchell. It will be performed by Demarre McGill starting Thursday at Benaroya Hall.

Joni Mitchell first made a name for herself as part of the '70s folk scene. But from her very early career, jazz musicians and jazz have influenced her music.