Photo of Michael Hersch by Richard Anderson American composer Michael Hersch and librettist Stephanie Fleischmann’s “Poppaea,” will have its world premiere at Switzerland’s Festival ZeitRäume Basel on Sept. 10 & 12, 2021, before moving on to the Vienna and the Wien Modern Festival, Nov. 5-7, 2021. The production is directed by Markus Bothe. The one-act opera stars soprano Ah Young Hong, a frequent {…}