This is a Windows feature I can't find on the Mac nor in Google searches other than to find other people looking for the same thing. I would like to have a simple sound played when the Caps Lock, Scroll Lock and Num Lock are played. As a semi-sighted person it is hard to tell when these keys are pressed even if I watch my hands or try to touch-type. So, dear friends, where can I find such a thing? Thaks!