Logical grooves for Tuesday's MEDICINE BALL CARAVAN (11am-noon Central Standard on KRVS Public Media 88.7FM locally or www.krvs.org) include the latest by Brass Bed, Destroyer, The Mynabirds, TLKR, The Arcs and Ariel Pink. Also: some Brother Dege Legg, The Viatones, Thurston Moore, Tame Impala, Black Sabbath, David Bowie, MC5 and more.