AIR FORCE BAND ensembles, Friday at 8, in the 30th annual "Christmas in August" family concert. Free. Sylvan Theatre, Washington Monument grounds. 202-767-5658 or 202-619-7222.

ARMY BAND ensembles, Friday at 8. Free. West Steps of the U.S. Capitol. 703-696-3399 or 202-619-7222.

NAVY BAND ensembles, Monday at 8. Free. West Steps of the U.S. Capitol. 202-433-2525 or 202-619-7222.

NAVY BAND -- Tuesday at 8. Free. Navy Memorial, 701 Pennsylvania Ave. NW. 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.

Chamber Groups

ROCK CREEK CHAMBER PLAYERS -- Sunday at 4. Free. Christ Lutheran Church, 8011 Old Georgetown Rd., Bethesda. 202-337-8710.

ARMY FIELD BAND chamber ensembles, Sunday at 3. Grace Episcopal Church, 1607 Grace Church Rd., Silver Spring. 301-677-6586.

ARMY FIELD BAND chamber ensembles, Tuesday at 7. Free. Oakland Mansion, 5430 Vantage Point Rd., Columbia. 301-677-6586.

CHICAGO CLASSICAL ORIENTAL Ensemble, Wednesday at 6. Free. Millennium Stage, Kennedy Center Grand Foyer, 2700 F St. NW. 202-467-4600 or 800-444-1324 (TDD: 202-416-8524).


BENJAMIN SCOTT -- violinist, Sunday at 3. Free. The Lyceum, 201 S. Washington St., Alexandria. 703-799-8229 or 703-838-4994.

KATHRYN H. HILL -- mezzo- soprano, with tenor Antonio Giuliano, violinist Mia Van and pianist Velma Grier, Saturday at 4. Roberts Memorial United Methodist Church, 606A S. Washington St., Alexandria. 703-508-1844.

HELEN HAWLEY -- carillonneur, Saturday at 6. Free. Netherlands Carillon, Fort Myer and Marshall drives, Arlington. 703-289-2500.

KATHERINE YOUNG, Kathryn Meany and Shawn Welk, oboists, Sunday at 6. Westmoreland Congregational United Church of Christ, 1 Westmoreland Circle, Bethesda. 703-861-3607.

RONALD STOLK -- organist, Sunday at 6. Free. National Shrine of the Immaculate Conception, 400 Michigan Ave. NE. 202-526-8300.

SONYA KIM -- pianist, Tuesday at 12:10. Free. Church of the Epiphany, 1317 G St. NW. 202-347-2635.