Clear the haze surrounding the Grateful Dead’s Workingman’s Dead and American Beauty and you get a luminous Americana closer to Appalachia than Haight-Ashbury. Here, new-style folk band Ollabelle—co-founded by Amy Helm (daughter of The Band’s Levon)—supports a ramble of stars as they recover the heart of those American beauties. Sharing lead vocals are country-bluegrass icon Lauderdale; Dylan collaborator Mansfield; the singer-composer for Crooked Still, O’Donovan; and the “incredibly talented” Russell (Village Voice)—a freewheeling collective that evokes The Band, but raises a new, unvarnished Dead.