This Massachusetts band started with the same pedigree as any other posthardcore outfit, but these days they sound like emissaries from some alternate rock reality. What if grunge hadn't trailed off into thin derivative bluster? What if, instead of leaning on catharsis (by definition a short-lived burst) to milk the angry-young-man market at the expense of longevity, some of the raging riffmeisters of the class of '92 had learned to express their angst via a cooler, more sustainable architecture? On 2000's Jupiter, Cave In started to assemble their bellow and crash into longer, more complex constructions; three years later their engineering still sounds alien. Antenna continues this progression, but brings to the band's chilly city in the clouds some poppy warm tones and welcoming short songs--a few fist-pumping anthems, even, for a nation that doesn't exist yet. Wednesday, September 17, 6:15 PM, House of Blues, 329 N. Dearborn; 312-923-2000.