Dave Simonett (vocals and gutar), Erik Berry (mandolin), Dave Carroll (banjo and vocals), Tim Saxhaug (bass and vocals) and Ryan Young (fiddle and vocals) have been putting a modern, thrashing, turned-up twist on bluegrass music, as Trampled by Turtles, for more than a decade. And like the Avett Brothers and Mumford & Sons, this Duluth, Minn., five-piece employs folkie and Americana instruments—plus layered harmonies—to get their point across, sometimes doing it a little bit louder. They released their first album, Songs from a Ghost Town (stream it below), in 2004, and Trampled by Turtles (above, playing “Are You Behind the Shining Star” on Late Show with David Letterman) have been steadily playing high-energy live shows ever since. Their seventh LP, Wild Animals (stream it below), out this past July, finds them in as fine form as ever. AllMusic says, “On their seventh long-player, Duluth’s acoustic troubadours Trampled by Turtles continue to push the outer limits of folk and bluegrass playing light against darkness, delivering one of their most thoughtful and downtempo albums to date.” Currently crisscrossing North America, their tour brings them to Terminal 5 tomorrow night.