As defined by critic Simon Reynolds, post-rock is a catch-all term for artists who employ rock instrumentation in pursuit of experimental, non-rock sounds. It’s a sensibility that can be traced back to ’80s icons Talk Talk, who famously abandoned their hit-making pop style for a more atmospheric aesthetic. As indie rock collided with record-collector culture in the ‘90s, bands like Tortoise and Stereolab introduced elements of dub, jazz, and Tropicália into the mix. Other artists, however, have put post-rock’s expansive canvas to more impressionistic use, be it the volcanic ruptures of Mogwai or the tearjerking drama of Sigur Rós.