Voices gone during intro cutscenes.

Details:
As the tittle says. I created a new character to show the game to some friends and to my surprise the voices during all the introductory cutescenes were missing. They were fine when i created my character back in september and it's the same PC so i dont really understand why this may happen.

Date & Time: August 21 11 PM
Frequency: Always
Platform: PC
PC Manufacturer & Model Number: Homebuilt Computer
OS: Windows 7 Home Premium
Graphics Card: NVIDIA GeForce GT 240
ISP: Iberbanda

I've already checked the in-game volume adjusters and they are all set on max.