(Credit: Jiyang Chen/Javier del Real/ Simon Pauly) The Festspielhaus Baden Baden has announced its 2020-21 season. For this article we will only highlight vocal performances. The season opens with Bartók’s Concerto for Orchestra and “Bluebeard’s Castle.” Rinat Shaham and Gerald Finley star in the later with Sir Simon Rattle conducting the London Symphony Orchestra. Performance Date: Sept. 20, 2020 Benjamin {…}