I sent the following to the company that bought Sigmatel Audio, and then they directed me to the OEM (Dell) and they gave me a solution that didnt quite work.
Here is the email
I am having problems that seem to be caused by my Sigmatel High Definition Sound Card
The problem is this:
When I run a high graphics game, with all the graphics options up, the sound starts crackling and skipping like a CD.
There is no problem with the video card, and it is not the computer. It is a known issue with the Sigmatel driver that I have.
Also, when using Windows Media Player, the Sigmatel card causes the read ahead optimization to cut out the music (causes the end of every song to start skipping like a CD, and then pause, and then finish) as well as making every song pause for a few second (about 5 seconds) before it starts.
I am using Windows Vista.
What I did do was this:
I uninstalled the driver in Safemode, and just restarted, and Windows Vista fixed part of the problem for me, the read ahead optimization and skipping while listing to music has been fixed.
Now the problem only remains for The Sims 2 (PC Game)
I have 1GB RAM
120GB HDD
Dell E1505
Windows Vista Home Premium (YAY)
I have also tried installing the newest driver