Continued from page 9

1645 Trap Road, Vienna. 703/255-1900, 703/255-1868, www.wolftrap.org. Tickets at the box office or at www.tickets.com, 703/218-6500.

• The Calder Quartet. Ensemble looks to stretch the definition of a string quartet with music by Bartok, Mendelssohn and Batagov. 8 p.m. April 11. $30.

• Cellist David Finckel, pianist Wu Han. 8 p.m. April 25. $30.