Classical picks

Blue Heron Renaissance Choir, under Scott Metcalfe, sings in First Church, Congregational, Cambridge, tomorrow at 8 and Sunday at 3. . . . Myung-Whun Chung leads the Dresden Staatskapelle in a Brahms program at 3 p.m. Sunday in Symphony Hall. . . . Steven Lipsitt conducts the Boston Classical Orchestra in Bach, Beethoven, and Robert Aldridge at 8 tonight and at 3 p.m. Sunday in Faneuil Hall. . . . Pianist Sergey Schepkin plays Debussy, Mussorgsky, and Boston composers at 8 tomorrow in Jordan Hall. . . . New England Light Opera presents staged concert performances of Romberg's ''The New Moon" at 8 tonight and tomorrow in the Tsai Performance Center.