VArranger2 is such an open system that one with the knowledge and skills of Momboc can work out an elaborate custom control setup for it or someone like me without such talants can still make a 50 plus functions control surface out of just an ordinary PC keyboard as in the video. Among my controllers for vArranger2 are a $10 mini Bluetooth keyboard with close to 50 functions, $10 Bluetooth gamepad (12 functions), MIDI Expression Quattro for 4 foot switches(The Hosa FSC-385 dual latching foot switch takes up only plug in of the Quattro and yet gives two functions), Korg Nanokontrol2 with all the slides, knobs, and buttons I need, and etc, etc. I have the mini wireless PC keyboard and gamepad attached to my midi accordion. I can stroll around and yet control many functions and call up twenty different sounds - all wirelessly.