(Credit: Tatyana Vlasova) The Boston Symphony Orchestra announce its 2020-21 season noting that anything can change due to the coronavirus pandemic. As always we highlight the vocal performances in this season announcement. The Beethoven Cycle concludes with Andris Nelsons leading the composer’s Ninth Symphony with soloists Amanda Majeski, Tamara Mumford, Pavel Černoch, Kwangchul Youn, and Tanglewood Festival Chorus. The program {…}