Watch Online Free on Watchseries. In Duisburg, Canadian pianist Marc-André Hamelin—world-renowned for his exceptional technique—delivered a standout performance at the Ruhr Piano Festival, to great acclaim from both audiences and critics alike. The program featured works by Joseph Haydn, John Oswald, Nikolai Medtner, and Sergei Rachmaninoff, as well as one of his own compositions, “Boîte à musique.”