[Fix!] No sound at Press Start screen and beyond

So I was going crazy thanks to the second-to-last bug on the Bugs and Problems wiki page: "Sounds cuts out after Press Start screen".

Reinstalling the game didn't help, so I figured it was either some sort of VC++ issue, or something left behind in UserData. I deleted files one at a time until I discovered the culprit seemed to be the Reg0.dat file. I launched the game, it recreated the file, and sound worked again. Hooray!

So again:

Close the game.
Browse to the UserData folder (for the Steam version that's /Steam/steamapps/common/super meat boy/UserData/)
Delete the Reg0.dat file.
Relaunch the game, and sound should work again!

If someone feels like updating the Wiki page, that would be awesome.