The roots don’t get any deeper than at a Rosanne Cash–curated concert. It starts with the undiluted Mississippi Hill Country Blues of Cedric Burnside. The grandson of legendary bluesman R. L. Burnside, his music is gritty and true. If you know The Black Keys, Burnside represents the wellspring from which they sprung. Molly Tuttle has notable lineage too. The guitarist-vocalist’s father is bluegrass icon Jack Tuttle, and her irresistible, crystal-clear vocals and flatpicking guitar style make her a contemporary roots star you won’t want to miss.