From "ATI MULTIMEDIA CENTERT Version 8.9 Release Notes"
"Using the ATI ALL-IN-WONDERT with Creative's Audigy family of Cards
The Creative Lab's Audigy family of sound cards has architectural
differences from earlier SoundBlaster products in order to provide enhanced
audio quality. These changes have an impact on how the ATI MULTIMEDIA
CENTERT works when an ATI ALL-IN-WONDERT is used with an Audigy card. To
partially address these issues, Creative has made available a special
version of their drivers, which allows the ATI MULTIMEDIA CENTERT to
function correctly. These drivers are version 250 (or later) of the Audigy
drivers. Please make sure you are using the correct drivers."