The Bayreuth Festival has announced a new cast change for its August 19 performance of “Die Meistersinger von Nürnberg.” The company said that “Axel Kober will conduct instead of Daniele Gatti, while Michael Volle will sing the role of Hans Sachs instead of Georg Zeppenfeld and Ya-Chung Huang will take over the role of David for Matthias Stier.” Kober made his Bayreuth debut in 2013 and has since conducted {…}