Live at Bonnaroo is one man, one voice, one amplified acoustic guitar and tens of thousands of festival revelers in a big field in Tennessee. Having played with several groups at last year's Bonnaroo Music Festival, Haynes, one of the busiest guys on the roots-music scene, managed to break from the jam-packed bill and venture solo to the stage for a sixteen-song set that became this live release. His acoustic foray, which opens with a version of Radiohead's "Lucky," also features a run through U2's "One," Don Henley"s "Wasted Time" and a handful of originals, including a paean to the late Jerry Garcia, "Patchwork Quilt." The sound is refreshingly spare, while Haynes's voice is simultaneously road-weary and soulful. The liner notes mention that he'd been up carousing and jamming with Widespread Panic until the wee hours the night before this performance and was riding a coffee buzz for this "early" (12:30 p.m.) outing. Those rock stars got it rough. Don't miss the closer, the Gov't Mule staple "Soulshine," which includes vocal assistance from South Africa's Vusi Mahlasela. Not too shabby.