Strayhorn, Ellington celebrated in concert, rare recording

The music of Duke Ellington and Billy Strayhorn - alone or in collaboration, as they were for nearly 30 years - represents some of the most sophisticated and complex works in jazz. Together (though rarely in the same room) they penned eccentric yet commercial compositions such as "Tonk" and "Strange Feeling," in which arrangements added subtle classicism to ferociously masculine orchestration.