Finding a person who could step into such a part at such short notice would usually be rather difficult. Last night, however, it proved easy. Tenor Andreas Schager, who had sung the demanding role before, was due to sing The Magic Flute with the Berlin Philharmonic under Simon Rattle in the same building a few hours later. Fifteen minutes before Siegfried's curtain went up, conductor Daniel Barenboim made the decision that Schager would sing the part from the wings.