The Philadelphia Orchestra has announced its 2020-21 season featuring a number of important soloists. For this article we will focus on vocal performances. Beethoven’s Missa Solemnis is set to be conducted by Yannick Nézet-Séguin with a cast that includes Jennifer Rowley, Karen Cargill, Rodrick Dixon, and Eric Owens. Joe Miller directs Refik Anadol’s Visually striking designs. Performance Dates: Oct. 9-14, {…}