Hey guys. I emailed LucasArts support about this and got a reply with some suggestions. I haven't tried them myself just yet. Here's a copy of the email text:
There are new sound blaster Audigy drivers available that may help with
your problem. You can find these new drivers here:
Also, you may want to try adjusting the sound card's "hardware sound
acceleration level" in the DirectX Diagnostic Tool Sound menu.
- Exit the game
- Click on the Windows Start button
- Choose "Run..."
- Type DXDIAG in the "Open" field and click OK
- Select the Sound tab on the DirectX Diagnostic Tool
- Lower the "hardware sound acceleration level" one notch and click
Try playing the game with this setting. If the problem continues to
occur, you may want to return to this menu and try a different
Please note that you may need to reset sound acceleration to the
original setting once you have finished playing the game to avoid problems
with other applications.