Wednesday's MEDICINE BALL CARAVAN on KRVS (11am-noon Central Standard on 88.7FM locally or krvs.org) does the newest by Summer Salt, Cut Throat Finches, Justin Townes Earle and Mavis Staples. Also: some Father John Misty, Elton John, Flamin' Groovies, The Who, James House & the Blues Cowboys, Roddie Romero & the Hub City All Stars, Velvet Underground, The Bo-Keys and Canned Heat.