Rod Modell’s intoxicating fusion of natural and electronic sounds can be traced back to one moment at a coffeehouse in Detroit more than a decade ago. “I don’t really know what the hell happened that night,” says the dub-techno maven of the gig (performed as Waveform Transmission). What he does remember is this: It was around 10:30 p.m. inside the century-old Victorian that at the time housed Zoot’s Coffeehouse.