The 1980s. Neo-liberal excess. Crumbling communism. Military juntas ruling with an iron fist. And of course, freaked out music. Contort Yourself are turning back the clock and returning to an unholy fount of inspiration with “80s Underground Cassette Culture Volume 1.” A buffet of beaten up and brutalized tracks are on offer from unknown outfits and respected experimenters. Across two LPs expect to find noise reductions, post punk bitterness, no wave grunts, distortion soaked strings and vocals lost in a hail of pain. A road map into the weird and wild world of DIY back alley artists who, armed with only a tape and an idea, gave the established music norms a sharp fist to the throat…