CRYSTAL CASTLES Though 8-bit synth wizard/noise-monger Ethan Kath claims that all of Crystal Castles’ music “is really sad and bleak,” the duo is an invigorating adrenaline hypo to the heart. The Toronto distorto-synth-punk act’s moniker comes from ’80s cartoon She-Ra, and not the vintage video game soundtrack of the same name, but low-res Atari squelch figures heavily in their songs. Chaotic, mechanical, icy and oddly emotional, the duo’s sound builds on the hooky noise-pop pioneered by The Jesus and Mary Chain. Except that here, overdriven guitar squall is traded for divinely crappy synths. Calling card single “Alice Practice” is just that, a dry-run temp track that went viral. Firing a fistful of synapses, it’s this generation’s take on Eno’s and Phil Manzanera’s shared guitar solo on John Cale’s splintered “Gun.” Notorious for stage diving and whirling like a dervish, vocalist Alice Glass is all over the map. An over-modulated punk yowler on “Alice,” she coos like a kitten on the New Order-ish “Suffocation.” For a duo that claims to hate dance music, these two master the disco floor, folding, spindling and mutilating it in the process. $25. Sept. 27, 8 p.m. The Fillmore, 1000 N.C. Music Factory Blvd. 704-549-5555.