Quicktime playback distortion?

I'm getting playback distortion from Itunes/Quicktime... Does anyone know how I can fix this? I have WinXP, and a Soundblaster Audigy 2. Downloaded the latest Itunes/Quicktime, and the latest Audigy 2 drivers.
Thanks for the help

perhaps let's first work through the usual suspects from this document:
iTunes and QuickTime for Windows: Songs and other audio don't play correctly

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