Montréal’s Freak Heat Waves sound like they emerged from the depths of a rancid bog on a moonless night. They strain the darkest, most rattling elements from murky genres such as goth, industrial and new wave and reassemble them into a hulking monstrosity. Discordant riffs and cacophonous soundscapes collide in a disorienting but undeniably mesmerizing union. Doomsday synths and heavily processed vocals obliterate the intermittent glimmers of sunshine that penetrate the group’s sonic pall. Freak Heat Waves perform on Tuesday, April 17, at the Monkey House in Winooski. Fell Runner and locals the Onlys add support.