This is amazing.
From The Music Machinery blog:
The Swinger is a bit of python code that takes any song and makes it swing. It does this be taking each beat and time-stretching the first half of each beat while time-shrinking the second half.
Enter Sandman may be better than the real thing (sacrilidge, I know).
h/t @xandnotx
I now realize that none of these songs meant a thing. Now, of course, they do.