Tuesday's MEDICINE BALL CARAVAN (11am-noon Central Standard on 88.7FM locally or www.krvs.org) spins a new recording of Ani DiFranco covering Woody Guthtrie along with the latest by Randall Bramblett, Steve Earle, John Fogerty and another killer track from the upcoming Tedeschi Trucks Band. Also: some Be Good Tanyas, Wayne Hancock , Bob Dylan, Charley Patton and Dock Boggs.