Thanks for the info. Do you hear some aircraft sounds (such as during idle), but as you throttle-up, the sounds disappear? Some other users experienced this, but the sound acceleration setting solved that. I am currently unable to reproduce your problem exactly (we'll probably go buy a SB Audigy2 and test with it specifically), so I need as many details as possible.

In general, the problem is most likely related to the ability of the card (and driver) to play multiple sounds simultaneously. There must be some subtle incompatibility with Direct Sound (part of Direct X).

If you have any other clues to help solve this, please post. Thanks!