A pianist capable of poetry, philosophy and whimsy—sometimes all in the same piece—Mitsuko Uchida contrasts the lucidity of selected Preludes and Fugues from Bach's Well-Tempered Clavier with the febrile imagination of Schumann's Waldszenen, Sonata No. 2 and Fünf Gesänge der Frühe. Does that make Schoenberg's Six Little Piano Pieces (Op. 19) the lukewarm water of the program? Heaven forbid.