Why is the combination of words and music—song—such a powerful medium? Join music theory professors Keith Waters and Yonatan Malin for a discussion that looks at two specific genres, the American popular songbook and German lied, and points out some features of songs that make them enduring. Includes performances of songs by George Gershwin, Franz Schubert, Albert von Tilzer and Irving Berlin. Saturday, Oct. 24, 10:30 a.m. to 12 p.m., Imig Music Building. Part of CU on the Weekend, which is free and open to the public.