Following the 2012 release of their incredibly ambitious Shields, Grizzly Bear has been receiving a lot of attention and it's been keeping them busy. As both a tribute to this last year of galvanization and also, one imagines, as a place-holder for fans until the next record is released, Warp is reissuing Shields in two versions. One, called Expanded contains the original album plus eight bonus tracks of remixes, B-sides, and demos. The other, called B-Sides, is, as you might imagine, just the B-sides, without the original record preceding it. The remixes, courtesy of Liars, Nicolas Jaar & Lindstrom, offer a spectrum of ways that Grizzly Bear's songs might be interpreted not just as remixes but as ways they can function on their own, falling anywhere from almost pure atmospherics to thumping dancefloor anthem. The demos are another fine addition, sounding fleshed out in their own way, and not mere tape hiss noodlings, perhaps due to the varied nature of Grizzly Bear's not-demos, they sound evenly matched and professional by comparison.