OutKastDuff McKagan’s column appears every Thursday on Reverb. On Mondays he writes about what’s in heavy rotation on his iPod.OutKast, “Prototype,” The Love Below: A playful soul song that highlights how good of a songwriter Andre 3000 is and can be. I’m not really sure what has happened to OutKast since the release of Speakerboxxx/Love Below, but I want more like this, damn it. I like the slow jams…..Curtis Mayfield, “Freddy’s Dead,” Superfly: Curtis Mayfield is sort one of the unsung heroes of the early ’70s civil-rights movement. His social commentary by way of song painted a vivid picture of the black inner-city. “Freddy’s Dead” is the best of the best.The Soundtrack Of Our Lives, “Babel On,” Communion (Disc 1): I saw these guys twice last summer in Germany. They are one inspirational band to see, whether you are a musician or a fan. “Babel On” is one of those songs that translates well in a digital arena or a intimate venue. Get both of these disks if you can.