Rock at Knoch Battle of the Bands takes place from 5:30 to 11 p.m. Friday at the school off Dinnerbell Road, Saxonburg. Bands must apply by today. There is no entry fee and bands will be given 25 to 30 minutes of playing time. The winner will be determined via a voting ticket system. Call Judy Thompson at 724-352-4385.

<B>Harold Betters Quartet</B> plays from 7:30 to 9:30 p.m. today at the Westmoreland Museum of American Art, 221 N. Main S., Greensburg. Tickets are $10. On Friday, the group will play from 6 to 8 p.m. at the African Festival at Connellsville Senior High School, 201 Falcon Drive, Connellsville. Call 724-628-1350.

<B>Organist Brian Burns</B> gives a recital in the Heinz Memorial Chapel Concert Series at 3 p.m. Sunday on the University of Pittsburgh Oakland campus. Works by Bach, Pachelbel, and 19th- and 20th-century composers will be featured. The concert is free. Call 412-624-4157 or visit www.heinzchapel.pitt.edu.<B>Renaissance and Baroque Society of Pittsburgh</B> hosts Ensemble Caprice: Salsa Baroque at 8 p.m. Saturday in Synod Hall, 125 N. Craig St., Oakland. A preconcert talk begins at 7 p.m. and a question-and-answer session with the musicians follows the performance. Tickets range from $10 for students to $35 for reserved seating. Call 412-361-2048 or visit www.rbsp.org.