Alex Perialas is an American audio engineer, mixer, and record producer who helped lock in the tight, punchy thrash sound of the mid-1980s through the early 1990s from Pyramid Sound Studios in Ithaca, New York—working with bands like Anthrax, Overkill, Testament, Nuclear Assault, S.O.D., and Flotsam & Jetsam. Later on, his work stretches into other lanes (Bad Religion, Pro-Pain), and he’s also been tied to teaching sound recording at Ithaca College—because apparently someone had to explain to the next generation how to make guitars sound like a chainsaw with manners.