Bob Mould is a busy guy these days. Merge just re-issued the Sugar discography, and Mould is out on the road playing both Copper Blue and his forthcoming record, Silver Age, which comes out September 4. The first single, “The Descent,” hit the Internet this week, and it’s a corker. Perfectly blending Mould’s work in Hüsker Dü and Sugar, “The Descent” inspires repeated listens with its buzzing riffs and sing-along chorus. If Silver Age is anything like “The Descent,” Mould fanatics and virgins alike are in for a treat.