Jonas Kaufmann will return to New York this September in the world premiere of “Doppelganger” at the Park Avenue Armory. The Armory Commission will reimagine Franz Schubert’s rarely staged song cycle “Schwanengesang” as a multi-dimensional theatrical performance directed by Claus Guth. Kaufmann will be joined by pianist Helmut Deutsch and both will break the conventions of traditional classical performance with an evocative soundscape composed {…}