An oft-overlooked part of being a musician is endurance. Though Langhorne Slim's last release, 2012's The Way We Move, broke into the Billboard charts and drew a raft of good press, he's been paying dues for a dozen years. His first albums explored breakneck bluegrass-folk with a soulful, revival meeting spirit. His hard touring honed not only his skills and showmanship but raised his ambitions. For instance, 2009's Be Set Free revealed deft dynamism and enhanced storytelling chops. The Way We Move can feel unfocused, vacillating between sweeping gestures and intimate portraiture. Still, if Slim has arrived to larger crowds, it hasn't been an overnight story.