The Wiener Staatsoper has announced a cast change for its production of Rossini’s “Guillaume Tell.” The company said Roberto Frontali will sing the title role of Guillaume Tell replacing Carlos Álvarez who was originally scheduled. Frontali is well-known for work in the Italian repertoire including operas by Verdi, Donizetti, Puccini, Leoncavallo, Mascagni, and Cilea. He has performed at every major opera {…}