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The purported final album from the musical partnership of David Grubbs and Jim O’Rourke isn’t so much a record as it is a musical reconciliation. While previous efforts seemed to favor either O’Rourke’s tendencies toward atmospherics (like last year’s Upgrade and Afterlife) or Grubbs’ restrained piano/vocal excursions, Camoufleur emerges as a true collaboration, and it’s the closest Gastr Del Sol has gotten to approximating a rock album, as evidenced by the ratio of uptempo, standard-beat songs to pieces favoring the irregular rhythms and skewed vocals that predominate on earlier records. The unusually melodic vocals and expert percussion on the opening track, “The Seasons Reverse,” make it sound as if the Gastr guys have spent some quality time with fellow Chicagoans the Sea and Cake, but the next tune reverts to Grubbs’ obliquely meandering piano lines. Meanwhile, on the jubilant folk anthem “Black Horse,” O’Rourke’s John Faheyesque guitar combusts with strings and horns, then settles back in quiet reflection, in a gesture similar to those on his latest solo work, Bad Timing. It seems both O’Rourke and Grubbs (who also released a solo album last year) are wise to the notion that you can get more mileage out of two projects apiece than just one, and, for this reason alone, one would suppose they should be loath to part ways. For it’s on tunes like “Each Dream Is an Example,” in which a faintly cabaret-style vocal is coated with viscous Steve Reichian piano chords, that the best of both formidable talents collide, and you realize that it’d be a shame for them to throw in the towel just yet.—Amy Domingues