Dan Deacon, Live In Concert: NPR Music’s SXSW 2012 Showcase

Few high-profile musicians could disappear into the SXSW crowd as seamlessly as Dan Deacon, who doesn’t exactly cut a lithe, otherworldly, Mick Jagger-esque figure offstage. But everything about his set at Stubb’s on Wednesday night was a raving, raging bundle of surprises: Deacon puts on some of the most rivetingly unpredictable, oddly interactive concerts in the business, whether he’s teaching the crowd how to move in choreographed unison — witness the dance contest that precedes “Konono Ripoff No. 1“ — o