Butler County Symphony Association'

s annual meeting is 7:30 p.m. Tuesday at the symphony office, 259 S. Main St. Call 724-283-1402 or visit the website at www.butlersymphony.org.

<B>Pittsburgh Concert Chorale</B> presents "Jazz It Up!" concerts at 8 p.m. Saturday at Fox Chapel Presbyterian Church, 384 Fox Chapel Road in Fox Chapel, and at 4 p.m. Sunday at Ingomar United Methodist Church, 1501 W. Ingomar Road, Franklin Park. The concerts feature Tom Roberts on piano, Bob Rawsthorne on percussion and David Pellow on bass. Katherine Mueller is music director. Tickets, available at the door, cost $16 and $20 for adults, $8 for students and free for children younger than 12. Call 412-635-7654 or visit www.PCCsing.org.<B>Pittsburgh Camerata</B> presents "These Living Seas: Modes of Expression," dealing with the musical effect of modes on moods, at 8 p.m. Saturday at St. Andrew's Episcopal Church, 5801 Hampton St., Highland Park. The program includes both early and more recent music. Tickets are $20; full-time students pay $10. Call 412-421-5884 or visit www.pittsburghcamerata.org.<B>Pittsburgh Opera</B> presents Mozart's "The Marriage of Figaro" at 8 p.m. Friday and 2 p.m. Sunday. Single tickets start at $10.<B> </B>Call 412-281-0912, Ext. 216, or visit www.pittsburghopera.org.