Dance music has undergone a seismic shift in the last decade. So how do synth-pop pioneers New Order respond on their first LP since 2005? For "Restless," they go straight back to their roots. It's a shimmering pop opus of ringing guitars, a '60s radio chorus, and those familiar atmospheric synths from original keyboardist Gillian Gilbert, who returns on Music Complete. But she's not the only old friend here: keep an ear out for vocals from Iggy Pop and some production tricks from The Chemical Brothers' Tom Rowlands.