With Muhal Richard Abrams, George Lewis & Spencer Barefield. ?By 1975, the Art Ensemble of?Chicago was enjoying an unusual popularity. Originally an outgrowth of the Roscoe Mitchell?Quartet, the group was among the few free jazz ensembles in the world to attract a significant?audience. If the AEC formed a key part of Mitchell?s expression, this group would permit him to?emphasize the purely sonic interests apparent in his earlier work? – Stuart Broomer, from the CD?liner notes. The album features AACM founder Muhal Richard Abrams on piano and newcomers?(at the time) George Lewis on trombone (making his recording debut) and Detroit native?Spencer Barefield on guitar. This new version of the album features over twenty minutes of?additional previously unissued material including Prelude to ?Naima?, ?Naima?, ?Duet With?Spencer? and ?Nonaah?.