Klang is the city’s newest advocate of contemporary music. Founded by the young husband-and-wife team of James and Fiona Boznos–the only core members right now–it debuted in an enticing chamber potpourri. This time around the Boznoses are aiming higher: they’ve recruited some of the top-notch local freelance instrumentalists–whom James Boznos has befriended in his gigs as a timpanist with area orchestras–and they’ve snared the ever-busy Chicago Symphony Orchestra clarinet ace John Bruce Yeh to do a couple of solo turns. The hefty program tilts in favor of the postwar avant-garde; all the composers featured are well-known. Luciano Berio’s Sequenze IX and Elliott Carter’s Gra are on it, both virtuosic signature pieces of Yeh. A transcription of the “Evening Sound” aria from Philip Glass’s minimalist opera Satyagraha gives Fiona Boznos, a well-regarded pianist, a chance to strut her stuff. Jonathan Harvey’s Mortuous Plango, Vivos Voco, a skillful assemblage of computer-processed sounds, is one of those “concrete music” experiments favored by Pierre Boulez disciples. Much more fascinating examples of what cutting-edge Europe was like two decades ago are Gyorgy Ligeti’s intricately textured Chamber Concerto for 13 Instrumentalists (1970) and the rhythmically rich Carmen Arcadiae Mechanicae Perpetuum (1977) by the British composer Harrison Birtwistle. James Boznos, who’s studied conducting with Gunther Schuller, is in charge of the ad hoc chamber ensemble. Wednesday, 8 PM, Pick-Staiger Concert Hall, Northwestern University, 1977 South Campus Dr., Evanston; 847-467-4000. TED SHEN

Art accompanying story in printed newspaper (not available in this archive): photo/Karen A. Peters.