Sam Shepherd’s not-quite-techno is the 21st-century equivalent of good progressive rock or jazz fusion: sophisticated, intelligent music whose outward sense of exploration mirrors an almost psychedelic journey within. Inspired by his teenage epiphanies with techno in Manchester in the late ’90s and early 2000s, Cascade is easily his most immediate album: “club bangers” (“Key103”), acid bass (“Afflecks Palace”), even a little Giorgio Moroder-style Eurodisco for good historical measure (“Birth4000”). The beats are nakedly 4/4 and the surrounding ambience the kind of moody, infinitely cascading synth tapestries you might find on a psytrance mix, rendered with a grace that makes them feel paradoxically subtle. Having done complicated, Shepherd makes it simple.