How I fixed choppy, distorted, static, skipping, noisy iTunes play sound

I was having the problem many have noted since installing iTunes 7 on my iMac G5: My playback was choppy, distorted, noisy, gappy, and generally sounded like crap.
I reinstalled QuickTime itself, alone, from a download at http://www.apple.com/quicktime/download/mac.html
Now my playback is correct, normal, not choppy, not noisy, no static...
Ahhhhhhhh.
I hope this helps others.
Windows users, note: This is on an iMac. I'm not saying it will help you. But then, if nothing else is working, it may be worth a try for you.

Updated the driver:
SigmaTel High Definition Audio Codec
http://ftp.us.dell.com/audio/R114282.EXE
Bingo. Seems to play well now. I guess I should have thought of this myself. Thanks for your help.

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