I liked Ean Golden's button scratching idea that used FX, but I wanted to try to adapt it to work with just a single velocity-sensitive pad/button, and that's what I got for ya here.

Although, I have it mapped to work with my drumset, you can easily change it to fit whatever u want, all you need to do is change the commands to be the new button.

More Info:
-It's set to control Deck A
-also Controls FX Unit 4