SUMMER OPERA THEATRE Company -- Mozart's "The Impresario" and Puccini's "Suor Angelica" through July 18. Sunday at 2 and Wednesday at 7:30. Hartke Theatre, Catholic University, 620 Michigan Ave. NE. 202-319-4000 or 202-526-1669.
SUMMER OPERA THEATRE Company artists, Monday at noon. Free. Woodrow Wilson Plaza, Ronald Reagan Building and International Trade Center, 1300 Pennsylvania Ave. NW. 202-312-1300.
CHESAPEAKE ORCHESTRA -- Friday at 7, conducted by Larry Vote with soprano Christiane Noll, tenor Doug LaBrecque, trombonist Bryan Bourne and the St. Mary's College Chamber Singers in "Bernstein: Psalms and Songs." Free. St. Mary's College of Maryland, Route 5, St. Mary's City. 240-895-2024.
D.C. YOUTH ORCHESTRA -- Friday at 7. Free. Coolidge High School, Fifth and Sheridan NW. 202-723-1612.
U. OF MARYLAND Community Band, Friday at 7:30. Free. Montpelier Mansion, Montpelier Drive and Laurel-Bowie Rd., Laurel. 301-776-2805.
ARMY BAND and ensembles, Friday at 8. Free. West Terrace, U.S. Capitol. 703-696-3399 or 202- 619-7222.
NATIONAL SYMPHONY ORCHESTRA -- Friday at 8:15, conducted by Jose Serebrier with the Choral Arts Society of Washington and soloists Mozart's Overture to "The Marriage of Figaro," Borodin's "Polovetsian Dances" from "Prince Igor" and Beethoven's Symphony No. 9. Saturday at 8:15, conducted by Emil de Cou in an all-Tchaikovsky's program, including the "1812" Overture and "Swan Lake" Act IV with lighting effects, dance and narration. Filene Center, Wolf Trap Park, 1551 Trap Rd., Vienna. 703-218-6500 or 703-255-1860.
BALTIMORE SYMPHONY ORCHESTRA -- Saturday at 8, with the Mambo Kings in a Latin pops program, followed by fireworks. Oregon Ridge Park, 13401 Beaver Dam Rd., Cockeysville. 410-783-8000.
ALEXANDRIA SYMPHONY Orchestra -- Saturday at 8:30, swing music from World War II and Tchaikovsky's "1812" Overture, followed by fireworks. Free. Oronoco Bay Park, Union and Pendleton streets, Alexandria. 703-838-4200.
NSO SUMMER MUSIC Institute ensembles, Sunday at 6. Free. Millennium Stage, Kennedy Center Grand Foyer, 2700 F St. NW. 202-467-4600 or 800-444-1324 (TDD: 202-416-8524).
FAIRFAX SYMPHONY SUMMER Band, Sunday at 7:30. Mason District Park, Newton W. Edwards Amphitheater, 6621 Columbia Pike, Annandale. 703-941-1730 or 703-324-8680.
NAVY BAND and ensembles, Monday and Thursday at 8. Free. West Terrace, U.S. Capitol. 202-433-2525 or 202- 619-7222.
NAVAL ACADEMY BAND -- Tuesday at 7:30. Free. Annapolis City Dock, Annapolis. 410-293-1262.
AIR FORCE BAND and ensembles, Tuesday at 8. Free. West Terrace, U.S. Capitol. 202-767-5658 or 202- 619-7222.
NAVY BAND and ensembles, Tuesday at 8. Free. U.S. Navy Memorial, 701 Pennsylvania Ave. NW. 202-737-2300 or 202-433-2525.
AIR FORCE BAND and ensembles, Wednesday at noon. Free. National Air and Space Museum, Seventh and Independence SW. 202-767-5658 or 202-357-2700.
LIVERPOOL YOUTH ORCHESTRA -- Wednesday at noon. Free. The Old Post Office Pavilion, 1100 Pennsylvania Ave. NW. 202-289-4224.
BALTIMORE SYMPHONY ORCHESTRA -- Wednesday at 7, conducted by Juanjo Mena with violinist Jonathan Carney and saxophonist Gary Louie in Couperin's Concert Royal No. 4, Debussy's Sonata for Flute, Viola ad Harp, Ravel's "Le Tombeau de Couperin," Saint-Saens's Introduction and Rondo Capriccioso, Milhaud's "La Creation du Monde" and Bizet's "Carmen," Suite No. 1, preceded at 5:30 by wine-tasting and followed by dancing on the outdoor terrace. Joseph Meyerhoff Symphony Hall, 1212 Cathedral St., Baltimore. 410-783-8000 or 800-442-1198.
MARINE BAND and ensembles, Wednesday at 8. Free. West Terrace, U.S. Capitol. 202-433-4011 or 202- 619-7222.
KENNEDY CENTER OPERA HOUSE Orchestra, Thursday at 6. Free. Millennium Stage, Kennedy Center Grand Foyer, 2700 F St. NW. 202-467-4600 or 800-444-1324 (TDD: 202-416-8524).
MARINE BAND and ensembles, Thursday at 7. Free. U.S. Marine Corps War Memorial (Iwo Jima Memorial), on U.S. 50 next to Arlington National Cemetery. 202-433-4011.
CITY OF FAIRFAX BAND -- Thursday at 7:30, in the annual children's concert. Free. Veterans Amphitheater, Fairfax City Hall, 10455 Armstrong St., Fairfax. 703-385-7858 or 703-757-0220.
ALEXANDRIA CITIZENS BAND -- Thursday at 7:30. Free. Fort Ward Park, 4301 W. Braddock Rd., Alexandria. 703-883-4686.
THE JOZEF PAULY ENSEMBLE -- Friday at noon. Free. Woodrow Wilson Plaza, Ronald Reagan Building and International Trade Center, 1300 Pennsylvania Ave. NW. 202-312-1300.
THE JOZEF PAULY ENSEMBLE -- Saturday at 6. Free. Millennium Stage, Kennedy Center Grand Foyer, 2700 F St. NW. 202-467-4600 or 800-444-1324 (TDD: 202-416-8524).
ARCO VOCE -- Sunday at 3. Grace Church, 1041 Wisconsin Ave. NW. 202-333-7100.
"THE COSMOS ACCORDING to Crumb, Part III," Tuesday at 7:30. Washington National Cathedral, Wisconsin and Massachusetts avenues NW. 202-537-6200.
FAIRFAX SYMPHONY ORCHESTRA ensembles, Wednesday at 7. Free. Green Spring Gardens, 4603 Green Spring Rd., Alexandria. 703-642-5173 or 703-324-8680.
FAIRFAX SYMPHONY ORCHESTRA ensembles, Thursday at 2. Free. Colvin Run Mill, 10017 Colvin Run Rd., Great Falls. 703-642-7200 or 703-759-2771.
NATIONAL PHILHARMONIC ensembles, Thursday at 7:30. Strathmore Hall Arts Center, 10701 Rockville Pike, North Bethesda. 301-530-0540.
BYOUNGHO HAN -- pianist, Friday at noon. Free. Arts Club of Washington, 2017 I St. NW. 202-331-7282.
WASHINGTON INTERNATIONAL Piano Competition -- Preliminary rounds, Friday 1:30 to 6 at the Arts Club of Washington, 2017 I St. NW. Semi-final round, Saturday 2 to 5 at Phillips Hall, George Washington University, 22nd and H streets NW. Finals, Sunday 2 to 6 at the Ronald Reagan Building Amphitheater, 1300 Pennsylvania Ave. NW. 703-486-0071.
LAURA MANN -- soprano, Friday at 7:30. Free. Washington National Cathedral, Wisconsin and Massachusetts avenues NW. 202-537-6200.
BUCK LYON-VAIDEN -- carillonneur, Saturday at 6. Free. Netherlands Carillon, Fort Myer and Marshall drives, Arlington. 703-289-2500.
WILLIAM MONTGOMERY -- flutist, and pianist Roy Hakes, Saturday at 8. Free. Gildenhorn Recital Hall, Clarice Smith Performing Arts Center, University of Maryland, College Park. 301-405-5539.
RENA KIMURA -- violinist, Sunday at 3. Free. The Lyceum, 201 S. Washington St., Alexandria. 703-799-8229 or 703-838-4994.
JEFFREY SMITH -- organist, Sunday at 5. Washington National Cathedral, Wisconsin and Massachusetts avenues NW. 202-537-6200.
RICHARD KENNETH FITZGERALD -- organist, Sunday at 6. Free. National Shrine Of The Immaculate Conception, 400 Michigan Ave. NE. 202-526-8300.
ERIC PLUTZ -- organist, Tuesday at 12:15. Free. St. Paul's Parish, Charles and Saratoga streets, Baltimore. 410-685-5537.
JULIE VIDRICK EVANS -- organist, Wednesday at 7:30. Grace Church, 1041 Wisconsin Ave. NW. 202-333-7100.
CHAPEL CHOIR OF CHRIST'S College, Cambridge, Tuesday at 12:10. Free. Church of the Epiphany, 1317 G St. NW. 202-347-2635.
"WASHINGTON SUMMER SINGS" -- Tuesday at 7:30, sing Brahms's "Requiem" (in German) conducted by Jesse Parker. Western Presbyterian Church, 2401 Virginia Ave. NW. 703-442-9404.
CHAPEL CHOIR OF CHRIST'S College, Cambridge, Wednesday at 7:30. St. Columba's Church, 4201 Albemarle St. NW. 202-363-4119.
MARANATHA CHOIR -- Thursday at noon. Free. The Old Post Office Pavilion, 1100 Pennsylvania Ave. NW. 202-289-4224.
GAY MEN'S CHORUS OF Washington, London Gay Men's Chorus and Heartland Men's Chorus, Thursday at 8. Lisner Auditorium, 730 21st St. NW. 202-397-7328 or 202-994-6800.