James Murphy offers his second multi-track album as LCD Soundsystem, and it's as close to a perfect hybrid of dance and rock music's values as you're likely to ever hear. There's not a single weak track here, and many more already feel classic. "Sound of Silver" itself is a seven-minute suite that morphs from a rumbling, ice-cold, no-wave groove into a liquefied jumble of kalimbas, pianos, and fizzy synths.