Itunes sound distortion

All my songs in Itunes when played have distorted sounds, audio clipping or freeze up and this happened all of sudden for no reason with ITunes 9.01 which was working for a few days perfectly until yesterday. I played itunes files in Quicktime with no problem and I been searching forums for help with this issue.
So far I tried updated sound drivers, directx drivers, I changed options on QT in control panel to 16 bit, even put it in wavsound safe mode from the default direct sound, turn off EQ in itunes adjusted preamp & turned off sound enhancer too. I have reinstalled Itunes 9.01 and tried a older version 8.2 with no luck there either. I even updated my windows vista to SP2 for the heck of it hoping it would fix the problem.
I have a sound blaster X-FI and I changed various options with sound card settings with no results. I know it is probably not my system or sound card: Current Specs 3.2 ghz intel processor, 3gig ram, sb blaster x-fi and so on. Also, played music with wmp player and dvds no clipping.
I dont know if this makes difference in identifying the problem, but the windows startup sound clips and distorts too for some reason. I hope someone has the magical solution to fix this issue short of reinstalling windows in hope of fixing the issue.
Message was edited by: Kalibur

This worked.
Can Apple / Itunes not just do an upgrade to fix this as I think every one should have the same problem?

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Manufacturer:                                  Apple Inc.
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Transport:                                        Built-in
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Default Output Device:                    Yes
Input Channels:                               2
Manufacturer:                                 Blue Microphones
Output Channels:                            2
Current SampleRate:                      48000
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Itunes sound distortion

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