Deborah Voigt Has decided to retire the role of Isolde in "Tristan und Isolde" as she bowed out of the revival for the Washington National Opera. The singer said, "Returning to a role that I love but haven’t sung in a number of seasons, and encountering its unique challenges, has caused me to reconsider keeping it in my repertoire,. I’m very disappointed that I feel compelled to withdraw from this production, but am very happy to continue my association with WNO both this season and into the future." This is the second Wagner role she bows out of. She was scheduled to make her role debut as Ortrud in "Lohengrin."