keyboard - Assign different multimedia functions (like a notebook setup) to F1-F12 keys on desktop computers?

I want to attribute multimedia functions to F1-F12 keys on a desktop computer.

I know they have standard functions (like renaming a file with F2) but It would be way more useful If I could use F2-F3 to increase/lower the computer volume, and etc, pretty much notebook standard stuff.

Is there a user friendly, or not, way to do that?