Tuesday's MEDICINE BALL CARAVAN (11am-noon Central Standard on 88.7FM locally or www.krvs.org) rotates new & recent recordings by Spirits & the Melchizedek Children, Arcade Fire, Vertical Scratches, Stephen Malkmus & The Jicks, Julian Lennon and Ivory League. Also: expect some Camera Obscura, The Clash, T.Rex, The Idle Race, Electric Light Orchestra, The Beatles and Allah-Las.