Brahms on the double from Hamelin and Ax
Two pianos, four hands, one sensibility. Photo: Robert TorresMarc-André Hamelin returned to Celebrity Series last weekend in a concert haunted by doubles. The program was even comprised of two sonatas - the latter one scored for two pianos, for which Hamelin was joined by a second virtuoso, the brilliant Emmanuel Ax.But of course what counted artistically was that two presences - Clara Schumann and the great Ludwig …