The Cleveland Orchestra has announced its 2020-21 season. For the purposes of this article we will only highlight vocal performances. Franz Welser-Möst conducts Eldman’s Rothko Chapel and Mozart’s Requiem and Ave verum corpus. The concert features soloists Lauren Snouffer, Daryl Freedman, Julian Prégardien, Matthew Plenk, Peter Kellner, and violist Wesley Collins. Performance Dates: Sept. 24-30, 2020 Alan Gilbert conducts Beethoven’s {…}