Guitarist Luther Dickinson and his brother Cody were watching the musical tradition of Memphis blues they’d grown up with disappear. Sons of longtime Memphis musician and producer Jim Dickinson, they’d been steeped all their lives in the music of the South, and they weren’t about to let it go that easily. Forming the North Mississippi Allstars in ’96, they’ve spent the last 16 years making rootsy, rollicking Southern rock full of bluesy bluster and fuzzy guitars. Their latest album, Keys to the Kingdom, released in 2011, is mellower than the rest of their catalog and muses on life and mortality in the wake of their father’s passing. Luther’s worn-in voice and the Allstars’ toned-down style give their most recent collection of songs an unexpected sense of intimacy.