All the phrases you’d use to describe Purity Ring would work for any number of other trending indie bands: electronica synths twinkling over vaguely hip-hop beats—that sort of thing. But that belies just how good Montreal duo Megan James (lyrics, vocals) and Corin Roddick (everything else) really are. Their sound might be “in” right now, but their debut album, Shrines, will captivate long after the electronic craze has run its course.