New Music Chicago is bringing together 17 of the city's new-music ensembles for this unprecedented two-day festival of contemporary music at the Museum of Contemporary Art. The opening concert will start with an introduction by Mark-Anthony Turnage, one of two new composers in residence with the Chicago Symphony Orchestra, followed by performances of Paul Oehlers's Juggernaut for solo cello, Kirsten Broberg's Increscence for violin and piano, and the world premiere of George Flynn's virtuosic and at times jazzy Flamboyance for flute and piano. And Amy Dissanayake will play Levante, a work for solo piano by Osvaldo Goliijov, the other CSO composer in residence. Other highlights of the day include the always remarkable Eighth Blackbird and the Chicago premieres of works by Joseph Schwantner and Gordon Beeferman. Among the performing groups are Fulcrum Point with the Indiana Contemporary Vocal Ensemble, members of Maverick, and the International Contemporary Ensemble. This will be an amazing opportunity to hear an enormous range of new music, and at least half of the composers will attend. See also Sunday; a complete festival schedule can be found on page 42 in the listings. a 3 PM, Museum of Contemporary Art, 220 E. Chicago, 312-397-4010; tickets for the first program each day are $15, subsequent programs are $5 or free.