Tuesday's MEDICINE BALL CARAVAN (11am-noon Central Standard on KRVS 88.7FM locally or www.krvs.org) airs the latest by Chris Isaak, Aoife O' Donovan, Dylan LeBlanc, Tedeschi Trucks Band, Simo and Julian Primeaux. Also: some Lane Mack, Makers Reel, Electric Wurms and throwbacks by Buffalo Springfield, The Byrds, William Penny and Eric Burdon & the Animals.