Brian Eno did some of the Windows 95 sounds. (The 3.5 second start-up
sound). Now Robert Fripp has been hired by Microsoft to do sounds for
Windows Vista. For 3.5 second sounds, he is likely being paid fairly
well per second.
http://www.vnunet.com/vnunet/news/2148180/robert-fripp-helps-microsoftThere is a video clip here... (useless video but the audio may be of
interest).
Clay