Like throwing glittering shards of glass at a wall and seeing them coalesce into a Mandelbrot set, Caribou unleashes a prismatic refraction of sound as unlikely as it is enrapturing. Abstract squiggles and drones, Tibetan singing bowls, laughing monkeys, croaking frogs, harps, soft vocals and percussion so involved it requires two drum kits to reproduce live — all unfold like vibrant leaves belonging to the same very strange and vibrant tree. The man behind the electronic conjuring is Dan Snaith, a drummer, composer, and sometime-mathematician from Dundas, Ontario. His warm, unconstrained inventiveness embraces logic-defying rhythms, sunny psychedelia and, with most recent album Swim, a deep and unconventional form of dance music. The result is an enveloping, groove-inspiring flow, at turns hypnotic and exhilaratingly joyful. Currently abroad on their eighty-stop Relentless Sleep-Depriving Fall World Tour, Caribou brings their sonic kaleidoscope to the Paradise this Sunday, September 19.