Marc-André Hamelin, a pianist celebrated for his astonishing technique and profound musicality, explores the music of two restless visionaries: Ives, whose Concord Sonata salutes Transcendentalist thinkers from Emerson to Thoreau, and Scriabin, represented by his turbulent and soul-searching Third Piano Sonata. Robert Schumann’s mercurial Fantasy Pieces span humor, joy and brooding intensity.