The Polyphonic Spree live in concert. With host Bob Boilen. With two-dozen uniformed members, The Polyphonic Spree is more like a small army than a band. True to its image, the Dallas-based group makes grand, symphonic rock with the exuberance of a heavenly choir. The band brings its epic sound to Washington, D.C. for an evening of music, originally webcast live on NPR.org Jun. 30, 2007.