DJ Spooky doing a Roland Jam
You can watch this video on www.livejournal.com
The Subliminal Kid in the studio from Ruben Broman on Vimeo.
The System 100, for other reference (The modular he's using) is used heavily on Meat Beat Manifesto's R.U.O.K. album.
The thing he keeps kneeling to tinker with is a Roland RE-301 Chorus Echo, which Radiohead uses a lot on OK Computer.
Then the 909... well. Just listen to a techno album.