Blitzen Trapper's sixth album, last year's American Goldwing, finds the group settling ever further into a breezy classic-rock vibe. But sharp edges poke out, as the Portland, Ore., band finds ways to indulge its gift for psychedelic freakouts. Here, Blitzen Trapper performs live in Newport, R.I. For more of NPR's coverage of the Newport Folk Festival, visit www.npr.org/newportfolk.