Wednesday's MEDICINE BALL CARAVAN (11am-noon CST on 88.7FM locally or krvs.org) features tracks by Tony Joe White, Ollabelle, Lynn Drury, C.J. Chenier and Corey Ledet Zydeco. Also: a scheduled visit from Jim Lauderdale, Sara Douga and Roddie Romero to discuss the big 30th Anniversary of the Louisiana Crossroads Series happening later this evening.