Wednesday's MEDICINE BALL CARAVAN on KRVS (11am-noon Central Standard on 88.7FM locally or krvs.org) purrs with recent releases from Ida Mae, Lera Lynn, Lulu & the Broadsides and Mike Zito w/ Sonny Landreth. Also: some Elvis Costello, The Meters, Paul Revere & the Raiders, John Doe, Slim Harpo, Velvet Underground, Susan Cowsill, Mark Sultan, Bas Clas and Captain Beefheart.