A decade removed from the looped yelps and muddy chants that composed the brunt of its early work, Animal Collective's latest album, "Centipede Hz", has a whiff of mainstream aspiration. Chalk it up to the commercial exposure of its previous work: Upon its 2009 release, "Merriweather Post Pavilion" was the apex of a gradual move toward accessibility, harnessing the band's sprawling folk experiments in
