Bon Iver's Justin Vernon famously recorded his breakthrough For Emma, Forever Ago while holed up for four frosty months in an isolated cabin in rural Wisconsin. (Bon Iver is a bastardization of bon hiver, French for "good winter.") It makes sense that this press-sheet backstory has become the album's defining detail: Vernon's spare arrangements of voice and acoustic guitar feel absolutely solitary; his voice, which wavers between soulful croon (with shades of TV on the Radio) and broken whisper, practically fogs up in your ears. A good winter, indeed. (Neumo's, 925 E Pike St, 709-9467. 8 pm, $12, 21+.)