PAINE HALL. The Apple Hill Chamber Players. Mozart: Flute Quartet in D; Brahms: Piano Trio in C; Crumb: Vox Balaenae for flute, cello, and piano. Tickets: $2.50 (call 235-9551); free to Harvard students. April 26, 8:00 p.m.

MUSIC BUILDING (Room 1). Dr. Ursula Gunter lecturing on "The History of Don Carlos". April 27, 4:15 p.m.

DUNSTER HOUSE LIBRARY. Music by Dunster House composers: Harvey Inashima '74, Jonathan Sheffer '75, and Charles Kletzsch '46. April 27, 5:30 p.m.

ELIOT HOUSE LIBRARY. Chamber music played by Kathryn Patrikis, harpsichord; and Ruth Rubinow, viola da gamba. April 27, 8:30 p.m.

KIRKLAND HOUSE. Mozart and Bartok quartets and the Schubert string quintet. James Buswell and Annie Kavafian, violins; Yo-Yo Ma and Madeline Foley, cellos; and Marcus Thompson, viola. Tickets: $1 with Harvard I.D. April 27, 8:30 p.m.

DUNSTER HOUSE LIBRARY. Steven Goldberg, guitarist, playing works of De Visee, Tansman, and Bach. April 28, 5:30 p.m.

CABOT LIVING ROOM Charlotte Edwards, violin; Andrew Edwards, piano. Sonatas by Mozart and Bach. April 28, 8:30 p.m.

SANDERS THEATER. Joint concert of the Harvard Krokodiloes, Yale Whiffenpoofs, and Vassar Night Owls. Tickets: $2 (students: $1). April 28, 8:30 p.m.

DUNSTER HOUSE LIBRARY. Brandenburg Party. Strings invited to a reading of Mozart: Flute Concerto, K. 313 (Kathy Flanders, soloist) and Symphonies Nos. 35 and 40. April 29, 3:00 p.m.

ELIOT HOUSE LIBRARY. Recital by Martin Pearlman, harpsichord. April 29, 8:30 p.m.

KIRKLAND HOUSE. Trios Schubert and Dvorak played by James Buswell, Yo-Yo Ma, and Seth Carlin. Tickets: $1 with Harvard I.D. April 29, 8:30 p.m.

NEWTON COLLEGE CHAPEL. David Mitchell playing the Casavant organ, assisted by violinist Edgar Edwards. Works of Bach, Dupre, Lubeck, Mozart, and Schroeder. April 29, 8:30 p.m.

SANDERS THEATER. Indrani Rahman, Indian Classical Dance. Tickets: $4 and $6 (GSD students: $2). April 29, 7:00 p.m.

MUSEUM OF FINE ARTS (Lecture Hall). The Camerata presents An Elizabethan Evening. Music of Weelkes, Wilby, Dowland, and Byrd. May 1, 7:15 p.m.