Today's MEDICINE BALL CARAVAN (11am-noon Central Standard on 88.7FM locally or online at www.krvs.org) spotlights new releases by Rayna Gelbert, Hot Steel & Cool Ukulele, Jake Shimabukuro, Black Prairie, Wanda Jackson, Chuck Prophet and Jeff Lynne. Also: classics by Sixto Rodriguez, Grateful Dead, Cream, Graham Nash and Creedence Clearwater Revival.