A cheap floorboard
Looking for a cheap way to control your application with your feet?   floorboardpart

Costs:

A second hand pc keyboard = 90 euro cents

Ps/2 to usb adapter = 5 euros on eBay

Some spare wood or plastic sheet = free

A few screws = 50 euro cents.

If you use audio software like Ableton or Reason you what you can do with it!

Contact me for building tips