Both Long Island natives, Machine Girl’s Sean Kelly and Matt Stephenson first bonded as teens, finding common ground in the left-field dance music of Aphex Twin and DJ Rashad — “The first traction I got was from a footwork community on Facebook,” Stephenson says — and the industrial freak rap of Death Grips. They also shared a stubborn streak in support of heavy nerd rockers like Primus and Mr. Bungle, and the decreasingly cool nu-metal acts they’d grown up on: Slipknot and System of a Down, of course, but also artists who still haven’t received their popular Renaissance. “We liked Incubus… a lot,” Kelly says. “The first Incubus LP has the first jungle/drum-and-bass that I heard as a teenager. They let the DJ go crazy on some outro or hidden track, and I showed Matt. I wasn’t like, ‘This is drum and bass!’ I was like, ‘This is Incubus. Check this out.’” Over the past decade, the duo’s interests have grown more esoteric: Jungian psychology, Jodorowskian psychomagic, and tarot, to name...