Members of the quartet "Sound Image," Bill Lorenz of Benson, from left, Bob Starz of Atwater, Kevin Kiffmeyer of St. Cloud and Todd Mattison of Willmar, perform during the Youth Harmony Festival concert Saturday night at Willmar High School. The Youth Harmony Festival workshop gives local high school students a day-long chance to learn about barbershop harmonizing and close-harmony a cappella singing. Tribune photoby Ron Adams
