The Rock at Knoch Battle of the Bands is set for 5:30 to 11:30 p.m. Friday in the Knoch High School auditorium. Doors open at 5 p.m. Bands scheduled to perform are: The Followers, Unknown, Shift Change, Mosquito Pomegranate, Mighty, Oceans of Glass, Janet's Pet Planet, Back to The Good Stuff, and the Semi-Supervillians. The winning band is chosen by attendees who purchase voting tickets. Proceeds go to the Knoch choral program. Call 724-352-2446 or 724-841-6231.

<B>Allegheny RiverStone Center for the Arts, </B>Foxburg,<B> </B>hosts Gayle Martin Henry in concert on the Steinway at 2 p.m. Sunday in Lincoln Hall on Palmer Street. Tickets are $20 for adults and $10 for students. Call 412-867-1816. Any available tickets will be sold at the door.<B>The Kean Quest talent search</B>, including Allison Mizgorski of Butler and Jordann Versaw and Maria Vervos, both of Mars, continues with the vocal championship at 7 p.m. Friday at the Kean Theater, 5847 Meridian Road. Tickets are $10. Proceeds benefit the St. Barnabas free care fund. Call 724-444-5521.

<B>Pittsburgh Camerata</B> and guest music director Larry Allen present “Legends and Visionaries,” a concert of choral music written by legendary composers at 8 p.m. Friday at Sixth Presbyterian Church, 1688 Murray Ave.; at 8 p.m. Saturday at St. Andrew’s Episcopal Church, 5801 Hampton St.; and at 4 p.m. Sunday at Mount Lebanon United Methodist Church, 3319 W. Liberty Ave. Tickets are $15 in advance or $20 at the door; students pay $5. Call 412-421-5884.<B>Pittsburgh Opera</B> presents “Tosca” by Giacomo Puccini 8 p.m. Friday and 2 p.m. Sunday at the Benedum Center, 719 Liberty Ave. Call 412-281-0912, Ext. 225, or visit the website www.pittsburgh opera.org.