The first evening of Tully Scope devoted to the classical music of the past was no less adventurous than the first two concerts, which revolved around the work of Morton Feldman, who was one of the great musical adventurers of his generation. Emanuel Ax, a fastidious piano virtuoso who combines impeccable taste and restraint with a deep respect for the classics, is fairly new to late Schubert, as I understand. The late piano sonatas in particular, works of grand scope, rich harmony, and deep feeling, offer little in the way of purely pianistic attractions to show off Mr. Ax’s fluent technique. I almost feared that his mastery of the keyboard might even get in the way of Schubert’s music. These moving performances, on the contrary, went beyond mere elegance and delved deeply into the heart of Schubert’s writing. Emanuel Ax did indeed approach the music as a pianist, but, as always for him, the music came first, and that led him in new directions, which he navigated in a way entirely his own.