With sensaura 3D sound effects (ZoomFX and MacroFX) enabled, I experience skipping and crackling problems within games and speaker setup test in the GTXP control panel. However, I could not enable 3D audio in games with it disabled. The testing can be viewed in detail at the bottom of this page with drivers that was shipped with the card (version 4015). Later they have released new win2k drivers, however I still encountered same issues with them. It can be viewed in detail at the bottom of the page.