It is an instrument of nuances, of fine shadings and veiled beauty. The viola inspired wonderful pieces from those romantics searching for new sounds beyond the well-beaten path of virtuosity. For his new Genuin CD, the violist Rainer Moog has put together an outstanding program that unites the apparently familiar – Brahms’ two splendid sonatas, and the truly unusual – works by Robert Fuchs and Friedrich Kiel. Pianist Megumi Hashiba, a sought after chamber player, partners here with Mr. Moog.