Copenhagen's Efterklang often swell to ten players to better wow audiences with their earthshaking live shows. As with Sigur Rós and Rachel's, this orchestral pop group is clearly indebted to neo-classical composers like Steve Reich and Philip Glass; but it sets itself apart with a heavy reliance on the human voice, whether in the form of a swelling chorus or the haunted lament of a single singer. The group's latest album, Parades, plays a little bit like Arcade Fire at half speed. Openers and fellow Danes Slaraffenland are a mix of wiry guitars, cool electronics, and soulful vocals more reminiscent of TV on the Radio.