WOLF TRAP OPERA COMPANY -- Mozart's "Don Giovanni," Friday at 8 and Sunday at 2. The Barns at Wolf Trap, 1635 Trap Rd., Vienna. 703-218-6500 or 703-938-2404.
AMERICAN CENTER FOR PUCCINI Studies -- Leoncavallo's "La Boheme," Friday at 7:30 and Sunday at 4. Puccini's "La Boheme," Saturday at 7:30. Greenridge Baptist Church, 21925 Frederick Rd., Boyds. 301-528-4305.
AIR FORCE BAND ensembles, Friday at noon. Free. National Air and Space Museum Udvar-Hazy Center, 14390 Air & Space Museum Pkwy., Chantilly. 202-767-5658.
CHESAPEAKE ORCHESTRA -- Friday at 7, conducted by Jeffrey Silberschlag with singer Vonda Shepherd in Bartok's Concerto for Orchestra and Shepherd/ Froom's "Songs From the Heart." Free. St. Mary's College of Maryland, Route 5, St. Mary's City, Md. 240-895-2024.
BALTIMORE SYMPHONY ORCHESTRA -- Friday at 7:30, conducted by Jeffrey Kahane with the Baltimore Choral Arts Society in Mendelssohn's "Calm Sea and Prosperous Voyage" and Beethoven's Symphony No. 9, followed by dancing on the outdoor terrace. Joseph Meyerhoff Symphony Hall, 1212 Cathedral St., Baltimore. 410-783-8000 or 800-442-1198.
ANNANDALE ORCHESTRA -- Friday at 7:30. Free. Lake Accotink Park, 7500 Accotink Park Rd., Springfield. 703-425-9300 or 703-324-7469.
ALEXANDRIA CITIZENS BAND -- Friday at 7:30. Free. Market Square, 301 King St., Alexandria. 703-883-4686.
FAIRFAX SYMPHONY ORCHESTRA -- Friday at 8, conducted by Donald Pippin in a pops program. Saturday at 8, with pianist Lisa Emenheiser in Beethoven's Piano Concerto No. 5, Schubert's Symphony No. 8 and Rimsky-Korsakov's "Capriccio Espagnol." Shenandoah Valley Music Festival, Shrine Mont Retreat and Conference Center, Orkney Springs, Va. 800-459-3396 or 540-459-3396.
ARMY BAND ensembles, Friday and Tuesday at 8. Free. West Steps of the U.S. Capitol. 703-696-3399 or 202-619-7222.
NAVY BAND ensembles, Monday and Thursday at 8. Free. West Steps of the U.S. Capitol. 202-433-2525 or 202-619-7222.
NAVAL ACADEMY BAND ensembles, Tuesday at 7:30. Free. City Dock, Annapolis. 410-293-1262.
U.S. COAST GUARD BAND -- Tuesday at 8. Free. Navy Memorial, 701 Pennsylvania Ave. NW. 202-737-2300 or 202-433-2525.
AIR FORCE BAND ensembles, Wednesday at noon. Free. National Air and Space Museum, Seventh Street and Independence Avenue SW. 202-767-5658 or 202-633-1000.
MARINE BAND ensembles, Wednesday at 8. Free. West Steps of the U.S. Capitol. 202-433-4011 or 202-619-7222.
MARINE BAND -- Thursday at 7. Free. U.S. Marine Corps War Memorial, on U.S. 50 adjacent to Arlington National Cemetery, Arlington. 202-433-4011.
WASHINGTON METROPOLITAN Philharmonic ensembles, Sunday at 3. Free. The Lyceum, 201 S. Washington St., Alexandria. 703-799-8229 or 703-838-4994.
TRINITY CHAMBER PLAYERS -- Sunday at 6:30. The Lyceum, 201 S. Washington St., Alexandria. 301-881-8969 or 703-838-4994.
CON BRIO -- Tuesday at 12:10. Free. Church of the Epiphany, 1317 G St. NW. 202-347-2635.
BALTIMORE SYMPHONY ORCHESTRA ensembles -- Thursday at 7. Free. Silver Plaza, on Ellsworth Drive between Georgia Avenue and Fenton Street. 301-565-7300.
BRAD NORRIS -- organist, Friday at 7:30. St. Joseph's on Capitol Hill, 313 Second St. NE. 202-547-1223.
EDWARD NASSOR -- carillonneur, Saturday at 6. Free. Netherlands Carillon, Fort Myer and Marshall drives, Arlington. 703-289-2500.
RICHARD FITZGERALD -- organist, Sunday at 6. Free. National Shrine of the Immaculate Conception, 400 Michigan Ave. NE. 202-526-8300.
WILLIAM NEIL -- organist, Sunday at 5. Free. Washington National Cathedral, Wisconsin and Massachusetts avenues NW. 202-537-6200.
NATIONAL SPIRITUAL ENSEMBLE -- Friday at 7:30. Free. Washington National Cathedral, Wisconsin and Massachusetts avenues NW. 202-537-6200.
MORNING STAR BAPTIST CHOIR -- Saturday at 6. Free. Lurman Woodland Theatre, Bloomsbury Avenue and Hilltop Road, Catonsville. 877-278-0961.