Coming up this week a sampling of shows from Chicago's Ravinia Festival. Jearlyn Steele sings a tribute to Mahalia Jackson, Dusty and Lefty get in the middle of dueling harmonica players, and Peter Ostroushko sits in with the Milwaukee Mandolin Orchestra. And because no trip to the Windy City is complete without a little blues, Pat Donohue sings the "Suburban Blues" and Ramblin' Jack Elliot sings "Hong Kong Blues." Plus, Suzy Bogguss, Howard Levy, Alice Peacock, The Hopeful Gospel Quartet, and Sam Bush.