WASHINGTON OPERA -- Mozart's "Don Giovanni," through Friday. Friday at 7. DAR Constitution Hall, 18th and D NW. 202-295-2400 or 202-432-7328.
TOWSON U. MUSIC FOR the Stage -- Penhorwood's "Too Many Sopranos," through Sunday. Friday at 8, Saturday at 8 and Sunday at 2. Stephens Hall Theatre, Towson University, 8000 York Rd., Towson. 410-704-2787.
NATIONAL SYMPHONY ORCHESTRA -- Friday at 1:30 and Saturday at 8, conducted by Osmo Vanska with pianist Stephen Hough in Brahms's "Variations on a Theme of Haydn," Scharwenka's Piano Concerto No. 4 in F Minor, Ravel's "Pavane pour une infante defunte" and Debussy's "La Mer." Kennedy Center Concert Hall, 2700 F St. NW. 202-467-4600 or 800-444-1324 (TDD: 202-416-8524).
BALTIMORE SYMPHONY ORCHESTRA -- Friday and Saturday at 8, conducted by Jack Everly with tenor Benjamin Brecher, vocalist Marta Burton and the O'Hare Irish Dancers in a pops program, "A Celtic Celebration: Music From the Emerald Isle." Saturday at 10 and 11:30 a.m., conducted by Lara Webber in children's concerts. Joseph Meyerhoff Symphony Hall, 1212 Cathedral St., Baltimore. 410-783-8000 or 800-442-1198.
NATIONAL CHAMBER ORCHESTRA -- Friday and Saturday at 8, conducted by Piotr Gajewski with pianist Brian Ganz in Chopin's "Krakowiak" and "Fantasy on Polish Airs," and Mozart's Overture to "The Marriage of Figaro" and Symphony No. 40 in G Minor. F. Scott Fitzgerald Theatre, 603 Edmonston Dr., Rockville. 240-314-8690 or 301-762-8580.
ARMY FIELD BAND and Bishop Ireton Symphonic Wind Ensemble, Saturday at 7:30. Free. Bishop Ireton High School, 201 Cambridge Rd., Alexandria. 703-212-5162.
PAN AMERICAN SYMPHONY ORCHESTRA -- Saturday at 8, conducted by Sergio Alessandro Buslje with bandoneon player Raul Jaurena and vocalist Marga Mitchell in "Todo Tango." Lisner Auditorium, 730 21st St. NW. 202-432-7328 or 202-994-6800.
NATIONAL CONCERT BAND of America -- Sunday at 2:30, conducted by Dean M. Wade. Knights of Columbus hall, 9707 Rosensteel Ave., Silver Spring. 301-588-3303.
ROCKVILLE CONCERT BAND -- Sunday at 3, Vince Patterson and Lyle Sexton. Free. F. Scott Fitzgerald Theatre, 603 Edmonston Dr., Rockville. 240-314-5006.
MOUNT VERNON ORCHESTRA and NOVA Community Chorus, Sunday at 7, in Borodin's "Polovetsian Dances" from "Prince Igor," Rimsky-Korsakov's "Procession of the Nobles" from "Mlada Suite," Mussorgsky's "Coronation" from "Boris Godunov," and Tchaikovsky's "Eugene Onegin" (excerpts) and Symphony No. 6. Carl Sandburg Middle School, 8428 Fort Hunt Rd., Alexandria. 703-845-6097 or 703-799-8229.
MARINE BAND -- Wednesday at 7:30, conducted by Jason K. Fettig in works by Bernstein, Prokofiev, Elgar and others. Free. Maryland Hall for the Creative Arts, 801 Chase St., Annapolis. 202-433-4011 or 410-263-5544.
ARMY CONCERT BAND -- Thursday at 7:30. Free. Brucker Hall, 204 Lee Ave., Fort Myer, Arlington. 703-696-3399.
ARMY FIELD BAND -- Thursday at 7:30, conducted by Donald Hunsberger. Free. Rouse Theatre, Wilde Lake High School, 5460 Trumpeter Rd., Columbia. 301-677-6586.
CHOO-CHOO STRING QUARTET -- Friday at noon. Free. Arts Club of Washington, 2017 I St. NW. 202-331-7282.
ENSEMBLE DA CAMERA OF Washington, Friday at 7:30. Levine School of Music, 2801 Upton St. NW. 202-686-9772.
BEAUX ARTS TRIO -- Friday at 8. Free, but tickets required. Coolidge Auditorium, Library of Congress, First and Independence SE. 202-432-7328 for tickets (service charges); 202-707-5502 for information.
LEGGIERO TRIO -- Friday at 8. Free. Old Town Hall, 3999 University Dr., Fairfax. 703-352-2787.
AIR FORCE BAND WOODWIND Quintet, Friday at 8. Free. George Washington Masonic National Memorial, 101 Callahan Dr., Alexandria. 202-767-5658.
NAVAL ACADEMY BAND chamber ensembles, Friday at 8. Free. Mitscher Hall, U.S. Naval Academy, Annapolis. 410-293-0263.
CATHOLIC U. WIND ENSEMBLE -- Friday at 8. Ward Recital Hall, Catholic University, 620 Michigan Ave. NE. 202-319-5416.
WASHINGTON ARTS TRIO -- Saturday at 1:30. Free. Anderson House Museum, 2118 Massachusetts Ave. NW. 202-785-2040.
BRIAN DAVID JONES -- clarinetist, violist James Batts and pianist Karin Firsow, Saturday at 2. Free. Levine School of Music, 2801 Upton St. NW. 202-686-9772.
COVINGTON STRING QUARTET -- Saturday at 3. The Lyceum, 201 S. Washington St., Alexandria. 703-838-4994.
NATIONAL SYMPHONY ORCHESTRA chamber ensembles, 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).
MARINE BAND CHAMBER ensembles, Sunday at 2. Free. George Washington Masonic National Memorial, 101 Callahan Dr., Alexandria. 202-433-4011.
CONTRASTS QUINTET -- Sunday at 5. The Phillips Collection, 1600 21st St. NW. 202-387-2151.
CHAKAVAK ENSEMBLE -- classical music of Persia, Monday at 7. Hammer Auditorium, Corcoran Gallery of Art, 500 17th St. NW. 202-639-1770.
CON BRIO -- Tuesday at 12:10. Free. Church of the Epiphany, 1317 G St. NW. 202-347-2635.
TOWSON U. CLASSICAL Guitar Ensemble, Tuesday at 8:15. Free. Kaplan Concert Hall, Center for the Arts, Towson University, 8000 York Rd., Towson. 410-704-2787.
ARMY BAND CHAMBER ensembles, Tuesday at 7:30. Free. Brucker Hall, 204 Lee Ave., Fort Myer, Arlington. 703-696-3399.
AIR FORCE BAND CHAMBER Players, Thursday at 8. Free. John Addison Concert Hall, Harmony Hall Regional Center, 10701 Livingston Rd., Fort Washington. 202-767-5658 or 301-203-6070.
FRIDAY MORNING MUSIC CLUB -- Friday at noon. Free. Sumner School Museum, 1201 17th St. NW. 202-333-2075.
DAVID FINCKEL -- cellist, and pianist Wu Han, Friday at 8. The Barns of Wolf Trap, 1635 Trap Rd., Vienna. 703-218-6500 or 703-938-2404.
MARC-ANDRE HAMELIN -- pianist, Friday at 8. Clarice Smith Performing Arts Center, University of Maryland, Route 193 and Stadium Drive, College Park. 301-405-2787.
LINDA EAGLESON -- flutist, and pianist Ron Levy, Friday at 8. Strathmore Hall Arts Center, 10701 Rockville Pike, North Bethesda. 301-530-0540.
KEVIN KENNER -- pianist, and baritone Jerome Barry, Friday at 8 and Sunday at 5. La Maison Francaise, Embassy of France, 4101 Reservoir Rd. NW. 202-625-2361.
LANG LANG -- pianist, Saturday at 4:30. Kennedy Center Concert Hall, 2700 F St. NW. 202-467-4600 or 800-444-1324 (TDD: 202-416-8524).
YUKIKO NISHINA -- koto player, and shakuhachi player M. Nishihama, Saturday at 7. Free. Potomac Community Center, 11315 Falls Rd., Potomac. 301-983-4471.
ANNE KOSCIELNY -- pianist, Saturday at 8. Free. Washington Conservatory of Music, 5144 Massachusetts Ave. NW. 301-320-2770.
J.Y. SONG -- pianist, Saturday at 8. John Addison Concert Hall, Harmony Hall Regional Center, 10701 Livingston Rd., Fort Washington. 301-203-6070.
VALERIE TRYON -- pianist, Sunday at 7. Free. West Garden Court, National Gallery of Art, Sixth and Constitution NW. 202-842-6941.
IVO KALTCHEV -- pianist, Sunday at 7. Free. Ernst Community Cultural Center, Northern Virginia Community College, 8333 Little River Tnpk., Annandale. 703-323-4387.
REYNALDO REYES -- pianist, Sunday at 7:30. Kaplan Concert Hall, Center for the Arts, Towson University, 8000 York Rd., Towson. 410-704-2787.
YUKIKO NISHINA -- koto player, and shakuhachi player M. Nishihama, Sunday at 3. Free. The Lyceum, 201 S. Washington St., Alexandria. 703-838-4994.
GREG CAMPBELL -- trombonist, Tuesday at 12:15. Free. St. Paul's Parish, Charles and Saratoga streets, Baltimore. 410-685-5537.
THE PAGANINI DUO -- guitar/violin, Wednesday at 6. Millennium Stage, Kennedy Center Grand Foyer, 2700 F St. NW. 202-467-4600 or 800-444-1324 (TDD: 202-416-8524).
FRIDAY MORNING MUSIC CLUB -- Thursday at 11. Free. Old Town Hall, 3999 University Dr., Fairfax. 703-352-2787.
FRIDAY MORNING MUSIC CLUB -- Thursday at noon. Free. Gallery at the Ellipse, 4350 N. Fairfax Dr., Arlington. 703-228-7710.
THOMAS J. FLAGG -- pianist, Thursday at 12:40. Free. Childers Recital Hall, Howard University, 2400 Sixth St. NW. 202-806-7082.
MARY WASHINGTON COLLEGE Show Choir, Friday at 7:30, Saturday at 7:30 and Sunday at 3. Dodd Auditorium, Mary Washington College, 1301 College Ave., Fredericksburg. 540-654-1012.
CATHOLIC U. CHAMBER SINGERS -- Saturday at 7:30. Free. Pope John Paul II Cultural Center, 3900 Harewood Rd. NE. 202-319-5416.
ROCK CREEK SINGERS -- Saturday at 8, with organist Theodore Guerrant. St. Margaret's Episcopal Church, 1820 Connecticut Ave. NW. 202-338-7464.
MONTGOMERY COUNTY LAW Enforcement Gospel Choir, Saturday at 8, with the Metropolitan Police Ambassadors of Goodwill. Arts Barn, 311 Kent Square Rd., Gaithersburg. 301-258-6394.
EASTON CHORAL ARTS -- Saturday at 8 and Sunday at 3, Handel's "Messiah." Avalon Theatre, 40 E. Dover St., Easton, Md. 410-822-0345.
GMU UNIVERSITY SINGERS -- Sunday at 3. Harris Theater, George Mason University, 4400 University Dr., Fairfax. 703-218-6500 or 703-993-1380.
NEW DOMINION CHORALE -- Sunday at 4, in Mozart's "Requiem." Schlesinger Arts Center, Northern Virginia Community College, 3001 N. Beauregard St., Alexandria. 703-442-9404.
CATHOLIC U. WOMEN'S CHORUS -- Sunday at 4. Free. St. Vincent de Paul Chapel, Catholic University, 620 Michigan Ave. NE. 202-319-5416.
VIENNA PRESBYTERIAN Church Motet Choir, Sunday at 7, in Bach's "St. John Passion." Vienna Presbyterian Church, 124 Park St. NE, Vienna. 703-938-9050.