Summer sounds on Wednesday's MEDICINE BALL CARAVAN (11am-noon on KRVS Public Media 88.7FM locally or anywhere via www.krvs.org) include the latest by Richard Thompson, Buffy Sainte-Marie and Galactic. Also: some Legendary Shack Shakers, John Doe, Neko Case, Los Texmaniacs, The Iguanas, Tom Petty & the Heartbreakers, Sly & the Family Stone and more.