
via this auction
"Quasimidi Technox rackmount synthesizer/drum machine."

EVERYTHING SYNTH

"I turned my attention this Saturday once again to the 221, and after concentrating for some time on the touchplate surface itself, I settled upon the joystick - or 2D voltage source as it is described on the panel. The initial purpose was to try to develop accurate control when using it in instances where it affects pitch - that is to say where any mis/use might be easily distinguishable by the listener."
via Retro Synth Ads where you'll find the write-up and more scans.