One might be tempted to think that there is no crossover in music that hasn't been done yet; and thankfully, one would be mistaken. DEEP RIVER presents a vibrant selection of 21 African American spirituals, interpreted by countertenor Michael Walker II and Old Music consort Alchymy Viols. A curious collaboration? Not at all, according to director Philip Spray. The viol consort's historical purpose was to arrange popular tunes of it's day; so it appeared only logical to try this setup on America's first folk songs. It worked. Additional harmonies are provided by a distinctly anachronistic grand harp, and counterpoint by a small field pump organ. The effect is stunning: a music so utterly, distinctly American, one wonders why this hasn't been done before.