THURSDAY
Busch-Reisinger Recital Series--noon--Kirkland St., Cambridge--Brian Jones, organ. Free.
Lecture-Demonstration on the University Organ--10:30 am--Appleton Chapel, Memoral Church--John Ferris, University Organist and Choirmaster.
Community Music Center of Boston--8 pm--48 Warren St., Boston--Bridgetower String Quartet performs works of Mozart, Ravel, and Brahms. Free. Info 482-7494.
Festival of Contemporary Music--2 pm--Jordan Hall, Boston--The Purcell String Quartet and the New York New Music Ensemble--program of contemporary composers Fodi, Exton, Mendoza, Merilainen, and Hegdal. Info 262-0122.
FRIDAY
Radcliffe Pitches Halloween Concert--8:30 pm--Lowell House Dining Room--also featuring Harvard Krokodiloes, groups from Williams and Dartmouth. Tickets $1.50.
Harvard University Band--8:30 pm--Sanders Theater--music by the Concert, Jazz, and Marching Bands.
Boston University Celebrity Series--8:30 pm--Jordan Hall, Boston--Julliard String Quartet. Info 482-2595.
Boston Musica Viva--2 pm--Jordan Hall, Boston--Richard Pittman conducts program of works by American composers.
Festival of Contemporary Music--8:30 pm--Kresge Auditorium, MIT--program of electronic music. Info 262-0122.
Dunster House Music Society--5:30 pm--Library--Elfrieda Hiebert, piano--Waltzes and Intermezzi of Brahms. Free.
SATURDAY
Dunster House Music Society--5:30 pm--Library--Heidi Peterson, recorder and baroque flute, Gaylen Alford, gamba, and Kathryn Patrikis, harpsichord--works of Veracini, Boismortier, Rameau, and Telemann. Free.
Musica Orbis--8:30 pm--Sanders Theater--it's pretty hard to describe, but 5 people play a bunch of instruments. Tickets $2.50 and $3.50.
Festival of Contemporary Music--2 pm--Jordan Hall, Boston--Collage and the New York String Quartet--program of contemporary composers Qwilich, Laderman, Druckman, Sur, and Monod. Info 262-0122.
Festival of Contemporary Music--8:30 pm--Jordan Hall, Boston--New England Conservatory Symphony Orchestra under Gunther Schuller. Info 262-0122.
MONDAY
Fromm Music Foundation--8:30 pm--Sanders Theater--The Pro Arte String Quartet, assisted by Richard Kogan, piano, Scott Nickrenz, viola, and Beverly Morgan, soprano--works of Bassett, Cruckman, and Imbrie. Free.
