This year marks the golden anniversary of the Art Ensemble of Chicago, the flagship band of the Association for the Advancement of Creative Musicians. Formed in 1966 and flourishing until 2010, the Art Ensemble distinguished itself by its unique performance practices--members played hundreds of instruments on stage, recited poetry, performed theatrical sketches, and wore face paint, masks, lab coats, and traditional African and Asian dress. The group, which built a global audience and toured across six continents, presented their work as experimental performance art, in opposition to the jazz...