Monday's MEDICINE BALL CARAVAN on KRVS (11am-noon Central Standard on 88.7FM locally or krvs.org) beams out the newest releases by Davy Knowles, North Mississippi All Stars, Quiet Hollers, The Parson Red Heads, Miranda Lee Richards, Lee Renaldo and Pixies. Also: classic spins from The Byrds, X, Deep Purple and The Alan Parsons Proje