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Zs performs "Olympics"

In the numbers world, math begins with simple calculation and ends at highly abstract “pure mathematics.” In the world of “math rock,” a genre defined by disjointed rhythms, angular riffs and dissonant chord structures, the “pure math” would be the Brooklyn-based brutal-prog band Zs. Spitting fragments of oblique harmony into pieces that draw from both avant-garde compositional techniques and prog rock dexterity, Zs has played on bills with bands like Animal Collective and Gang Gang Dance, as well as with modern composers Christian Wolff and Louis Andriessen. Equal parts rock band and chamber ensemble, the group pursues highly original abstractions that transcend both arenas. Check them out at Soundlab on Monday (Jan. 29), at 9pm