(Credit: Wiener Staatsoper official website) The Wiener Staatsoper has announced that tenor Hiroshi Amako and soprano Johanna Wallroth will take over the roles of Alfred and Ida in Johann Strauss’ “Die Fledermaus,” respectively, for all performances in the run. The operetta opens on Dec. 31, 2021, and will last until Jan. 5, 2022 for a total of four performances. Amako {…}