Sound Blaster Audigy Update On My PC, Some Original Source CDs Play Music Crystal Clear, And Others Play With A Poor Grainy Sound. Why?

On my PC, some original source CDs play music crystal clear, and others play with a poor grainy sound. Why? - sound blaster audigy update

The map from outside the sound card is a simple Creative Labs Sound Blaster Audigy, driver version 5.12.1.512, an ASUS motherboard. Win2K latest operating system. The software is Windows Media Player 9.00.00.3349. Creative Labs speakers are adequate and that the headphones Sennhiesers Nice. The problem of grain fluctuates sounds different business bought CDs of origin, regardless of the level of the game. I found when a data CD. In other words, if grainy and a crystal with B, then necessarily the case for the CD of A and B. I will begin a chart entitled to determine this detail. Any suggestion or reference sites would be appreciated.

Peace.