This box is a Signal Rigger, designed, built and custom-airbrush-finished by Dutch synth builder MarcMarc. It's a "a device that can transform external audio signals into voltages to manipulate other sound sources". If you want one, it will cost you $49,000. If that seems too expensive, Marc will build you a truly awesome looking Giant sequencer for just $47,000. Mark, on the Analogue Heaven board, wonders if these are really just "leave me alone prices". I guess if Elektron and Buchla make boutique synths, these are couture.