Sinfonia, Chorus, and Chamber Music, a Georgia Youth Symphony Orchestra and Chorus Concert.   Saturday:  3pm.  Sunday:  4pm & 7:30pm.  $5.  Dr. Bobbie Bailey Performance Center, Kennesaw State University, 1000 Chastain Road, Kennesaw.  More info:  770-429-7016 or www.georgiasymphony.org.