Hack a USB Computer Keyboard to Make a Synth Pedal Board

My son asked me if I could make a pedal board to connect to his laptop to use with his synth software, so that he can switch loops while performing -- or something musical like that. We decided to hack an old USB keyboard.

Step by Step Instructions here:

http://srmonk.blogspot.com/2011/08/hack-usb-computer-keyboard-to-make.html