(Credit: Klaus Frahm) The Deutsche Oper Berlin has announced its upcoming December 2021 performances. Mezzo-soprano Doris Soffel will give a concert singing lieder by Gustav Mahler and Kurt Weill. Performance date: Dec. 2, 2021 Soprano Anja Harteros gives a concert featuring Wagner’s “Wesendonck-Lieder” and “Liebestod” from “Tristan und Isolde.” The orchestra will also present Richard Strauss’ “Tod und Verklärung” op. {…}