A cast of thousands at Sanders on Friday: The Glee Club and H-R Chorus with the HRO. Definitely an exciting idea to stage collaborations of this sort. The ticket price ($2) must be a result of adding together the usual price of each group.

Impresario Lindgren at Kirkland comes up with three of the best players in the college: Kogan, Chang, and Ma. Always worth hearing.

I Dilettanti Nuovi are having their premiere concert at Lowell on Monday. The group is led by Ron Melrose, surely one of the most versatile musicians around. He successfully raided a variety of other groups for his singers; if the ensemble is on par with the individuals' abilities, it should be a strong sextet.

DUNSTER LIBRARY

Music for brass quintet. Ewald: Symphony for Brass; Cheetham: Scherzo. Free. Friday, April 26, 5:30 p.m.

SANDERS THEATER

Harvard-Radcliffe Orchestra, Chorus, Glee Club Strauss: Die Tageszeiten: Verdi: Four Sacred Pieces; Wagner: Prelude to Die Meistersinger. Tickets: $2. Friday, April 26, 8:30 p.m.

DUNSTER LIBRARY

Paul Scott, cello. Bach: Suite No. 3; Kletzsch: a new scene from the opera Jefferson (performed by the composer). Free. Saturday, April 27, 5:30 p.m. KIRKLAND JCR

Richard Kogan, piano; Lynn Chang, violin; Yo-Yo Ma, cello. Beethoven: Kreutzer Sonata; Schubert: Trio in E-Flat. Free. Saturday, April 27, 8:30 p.m.DUNSTER LIBRARY

Brandenburg Party. String players invited to an open reading of Bach: Brandenburg No.4, D-Minor Harpsichord Concerto; Mozart: Horn Concerto No.3. Conductors, soloists, sherry, and cookies provided. Sunday, April 28, 3 p.m.

LEVERETT JCR

Cynthia Leslie, pianist, in recital. Free. Sunday, April 28, 4 p.m.

LOWELL JCR

I Dilettanti Nuovi sing Renaissance vocal sextets. Free. Monday, April 29, 8:30 p.m.