The fifth season of monthly Second Sunday concerts opens Sept. 12 at the Krannert Art Museum. William Heiles, a UI professor of piano, will perform at 2 p.m. The program will include Franz Schubert's Sonata in G, Book I of Gyorgy Ligeti's tudes and "Out of Doors" by Bela Bartok. The concert will be broadcast live on the sponsoring station, WILL-FM (90.9). John Frayne and Vic Di Geronomo will be the hosts.