This issue is easy to avoid, just use the on-board audio.
Another alternative is to buy a non-creative card. These are inexpensive consumer cards and it does not take much to replace them.
paulbeattie , i did the same , i replaced my screeching XPS 720 with a HP-Voodoo Blackbird
Toronto699 - mind posting the specs for your Blackbird - I'm thinking of going the same route...
when i have time later in the day ill post my Birds specs, please chech the forums here , if u live in USA u may be able to buy a Blackbird at a retail store . HP has a few things comming up for Blaclbirds . its a wonderfull machine and the tech support is awesome. i did a Blackbird tech support test a little while ago. WOW no hassles , in fact give the tech support a call they would love to hear from u even if u do not have a Bird .free call
So far with a fresh install of Vista 64bit the sound works. I can not configure it to 5.1. 5.1 gives me the screech. Installing Vista updates now. What a wast this has been. 5.1 is why I got this sound card. Its a driver issue. Can't blame Dell for what Creative will not fix.
After a 200MB update did a restart and the screech came back. Now going back to 32bit. It works in 32bit so I guess I won't be on 64bit till my next rig. Money is tight right now so it could be years before I can get a $4K PC again.
I recommend Acronis True Image Home for backing up everything. I am restoring now. Later 64bit.
QX9650 , 2gb 1600 pc ram , cpu and graphic cooling , 790i ultra MB , W vista ultamate 32 , dual 280 gtx , xtreme gamer fatality pro , 1100kw power supply , 2 160HD , 1 750 HD , 2 light scribe DVD +- RW , blue ray disk drive , cyberlink DVD package , The Orange Box games , this is my second Blackbird , i bought a Blackbird 002 when first released. go configure one , even if u get half of whats in mine or a basic unit ull be very happy, and the HP accessory store is arriving soon for upgrades and added hardware , i went with nvidia because its better, and the ati u need something from Voodoo if u format the pc . go to hpblackbird.com but be sure to read the forum pages ask questions call blackbird