Thursday's MEDICINE BALL CARAVAN on KRVS (11am-noon Central Standard on 88.7FM locally or krvs.org) airs the most recent efforts from Perfume Genius and Louise Goffin. Also: classic tracks by Charlie Feathers, Flamin' Groovies, Rocket Morgan, Canned Heat, King Crimson, Jethro Tull and Eric Burdon & the Animals.