Actually, when I played this wav file, it wasn't the high-pitched beep that the slider defaulted to when I removed the default sound.wav file from my current desktop theme.
Windows XP Ding.wav file played a definite "ding" and the default sound I got was a definite "beep". I searched for all beep.wav files and wasn't successful finding the file that made the high-pitched sound.
I went to Control Panel\Sounds and Audio Devices and opened the "Sounds" tab and changed the sound for Windows\Default Beep to "none". Even after saving this as a scheme and rebooting, the high-pitched beep remained when moving the volume control slider up and down.
The only thing that you (Mungo) can do (as I see it) about this beep you can't tolerate is to highlight "default beep" under Windows and then using the browse button at the bottom, find a .wav file on your HD that is not as irritating to you and change it to that one. Just curious, what .wav file is shown when you highlight "Default Beep" on the "Sounds" tab???
Or, maybe you will be lucky and it will clear that sound for you when you select "none" for Windows\Default Beep. I was unsuccessful in doing that.

Pepsi One