Make some radio time for Tuesday's MEDICINE BALL CARAVAN (11am-noon Central Standard on KRVS Public Media 88.7FM locally orwww.krvs.org) featuring the latest by Dave & Phil Alvin, Shemekia Copeland, Fantastic Negrito, The Word, Megan Brown, Lizz Wright and Dayna Kurtz. Also: some Pokey LaFarge, Solomon Burke, The Band, Neko Case, Preservation Hall Jazz Band and more.