Most of these pieces by Paris-based composers may be unfamiliar—apart from Debussy’s Beau soir and Ravel’s Kaddish—but they merit rediscovery thanks to this duo’s superb playing. They make Henri Büsser’s Appassionato seem like the viola’s miniature answer to Franck’s Violin Sonata. Hahn’s exquisite melodic vein and virtuosity in Soliloque et Forlane stand out. Lovers of the viola need not hesitate.