Dwight Yoakam, Charlie Robison, Steve Earle, Robert Earl Keen and Asleep at the Wheel, among many others, have been added to the Austin City Limits Music Festival. The three-day event will be held in the Texas capital beginning Sept. 19 and is expected to draw 75,000 people. Previously announced performers include Rosanne Cash, Patty Griffin, the Mavericks and many others. 06/12/03