Duper, the new release from Morgan Geist, is a not-so-subtle callback to his 2001 EP, Super. “I was working most days with Kelley Polar on our new vocal project, Au Suisse, which isn’t really dance music at all,” he explains. “I started fooling around with these instrumental tracks at night for fun. Each track was in a different style, but they seemed to work nicely as a group. By the time I asked Kelley to contribute strings to the A-side, the record really started feeling like the sequel to Super.” Super Duper — get it? Indeed, the playful synth riffs and sweeping disco strings of “Twilight Express” echo the palette of Geist’s cult classic “24K” and early Metro Area. “Black Test Car” is a unique collision of minimal, almost krautrock-style drums, sound library textures and spacy electro percussion. Meanwhile, “Feeling Is Mutual” is a rare acid outing that pushes beyond the usual comfort zone, the 303 acting more as feather than hammer on top of major-key modulations. “I love a lot of Aphex Twin and I love sweet, ‘quiet storm’-style R&B,” says Geist. “I figured, why not?”