Wierd Sound Bug, please help!

Ok, so I was playing an old game on my computer called Stormrise. (got it uber cheap like 2 dollars or something).

I KNEW from the Reviews that it was prolly a horrible game, but I decided to buy and try it anyways since im a sucker for post-apocalyptic games of any sort.

ANYWAYS, the game worked fine for a couple of missions,

THAN SUDDENLY, the character voices got muted in the game. I could hear Everything else, but not the characters voices (on the main characters voice could be Heard).

This isnt bad, but here comes THE BAD PART:

I deleted the game from my system, restarted, BUT I WAS SHOCKED to notice that, now in ALL VIDEOS AND GAMES on my system, VOICES ARE MUTED.

The rest of the sound works, albeit wierdly, but no voice-overs whatsoever!

I deleted my VLC cache, restarted again, deleted the remnants of the bloddy stormrise game etc,

AND NADA,

I can not listen to any sort of voice-overs on my system anymore, not when running videos, and not when running games.

PLEASE HELP! Any advice would be appriciated.

(PS! And how can a game frak my system up like that, lol)

System Specs:

I7 3930

x2 Geforce GTX 690 (4 old 680 cards in total)

Asus Xonar Phoebus Soundcard

Logitech Z-906 Speakers (5.1)

32GB Ram

500Gig SSD

1TB Harddisk

Software/Programs:

Windows 8

VLC Player

Div X

Itunes and Quicktime

Standard Windows Media Player

I am guessing that this must be a problem with one or several of my CODECS since it seems to be effecting the sound quality of EVERYTHING ensuring that I cannot hear voices in videos/games (except on Youtube), but i am not sure.

Any assistance is much appriciated, thanks!