Anyone made a pad/button grid midi patch changer?

how is it a way to make Arduino/joystick as midi control data buttons to move the preset sound schematic and code faster as in the link : http://www.genovation.com/midipatch.htm

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or http://www.rattus.net/cgi-bin/packpic.cgi?audio.pages.g2-cont.images&front-panel.jpg