IRQ Routing

Information:

Motherboard - VIA P4VXASD onboard AC'97 sound disabled *drivers up-to-date*

Soundcard - Ensoniq AudioPCI (ES1370) *drivers up-to-date*


I need a little help understanding this. After reading a bit about IRQ, I noticed that devices sharing the same IRQ routes can cause conflicts. This brings me to my problem, my sound card Ensoniq AudioPCI by Creative Labs has been crackling, popping and making weird sounds. Now I tried updating the drivers, but obviously Creative doesn't have any working drivers for it. Which brings me to the IRQ Routing, I checked my video card (ATI) and my sound card and they both share IRQ Route 11. What I want to know is how can I possibly CHANGE routes of either the video or sound card therefore making the crackling disappear.

Please help, thanks. I'm going nuts trying to do this alone for the past 3 nights.