Tuesday's MEDICINE BALL CARAVAN on KRVS (11am-noon Central Standard on 88.7FM locally or krvs.org) airs recent and upcoming releases from Mavis Staples, The O'Jays, Jamestown Revival and Santana. Also: sounds of The Deslondes, Bob Dylan, The Legendary Shack Shakers, John Lennon, The Rolling Stones, Sonic Youth and King Crimson.