THURSDAY
Classical-Rock Opera titled "Collision of Worlds," written by Michael Levine of the Berklee School of Music. Admission $2. Sanders Theater, 8 p.m.
FRIDAY
Lowell House Opera produces "Der Freischutz" by Carl Maria von Weber. Mostly Harvard cast. David Commonday, music director. Repeat performances Saturday and Sunday nights. Admission $3.50, $2.50. Lowell Dining Hall, 8 p.m.
Yo-Yo Ma, cello, and Patricia Zander, piano, play their last major recital at Harvard. Admission $2. Sanders Theater, 8 p.m.
SATURDAY
Favorite chamber works of Ravel and Stravinsky, featuring the Pulcinella Suite and Introduction and Allegro, performed by nine musicians from Music 180. Kirkland JCR 8:30 p.m.
Cathy Barbash, viola, with Gerry Moshell, piano, play a Brahms sonata and the Bartok viola concerto. Dunster Library, 3 p.m.
SUNDAY
Heidi Ratner, flute, with Barbara von Schleinitz, piano, perform works of Poulnc, Roussel and Bach. Dunster Library, 3 p.m.
TUESDAY
Carter Bryan and Randy Hodgkinson, pianos, offer pieces by Schubert, Stravinsky, Brahms and Schumann. North House, Holmes Hall, 8 p.m.
