Soprano Karyn Levitt and pianist Eric Ostling will perform “In the Dark Times: Three 20th Century Austro-German Composers Who Worked with Bertolt Brecht,” a lecture-concert that features the collaborated works of poet Bertolt Brecht, composers Kurt Weill, Hanns Eisler and Paul Dessau, and translator Eric Bentley, in Porter House on Tuesday, March 10th at 4:30 p.m. as part of this year’s Copeland Colloquium.