Inon Barnatan, a gifted young pianist, is the connecting thread in an evening celebrating Schumann. He begins with selections from the Opus 12 "Fantasiest�cke" and continues with the three Fantasiest�cke for Clarinet and Piano, joined by the clarinetist Romie de Guise-Langlois. Mr. Barnatan also accompanies the violinist Ani Kavafian in his A minor violin sonata and several of Clara Schumann's lesser-known Romances. The Orion String Quartet plays the Quartet in A minor (Op. 41, No. 1).