Metric

Back when Emily Haines and James Shaw were first making a name for themselves in the blogosphere, it helped that they could point to membership in Broken Social Scene. But nine years down the road from winning Pitchfork’s heart with “Old World Underground, Where Are You Now?,” it hardly seems to matter. This year’s “Synthetica” is a widescreen electropop statement of purpose that, oddly enough, includes a guest appearance by the great Lou Reed.