Past collabs with Kanye and Nicki aside, no-one trades in six-stringed falsetto isolation like Justin Vernon (a.k.a. Bon Iver). Marching drums on opener Perth pummel us into vulnerability, but the emotional soccer-punch is in the spare, looping instrumentation, which veers from glitchy feedback to Orinoco Flows ambience. As in life, the heartbreak's in the things that can't be said. Breathtaking.