Those first two were actually sort of in a transitional period in synths. KMFDM used both analog but also quite a bit of digital. SP, however, seemed to use anything you could plug into a wall socket as long as it spat noise out the other end. I still have fond memories of grad study back at the University of TN, cruising up to Gatlinburg on my downtime and blasting Puppy's early racket (ie: 'Bites', 'Remission', 'Mind') out of the car to the apparent dismay of tourists. "Why...that doesn't sound like mountain music..." Heh...no sh*t, Sherlock.