The podcast Twenty Thousand Hertz recently did a two-part series on all of the Windows startup sounds[0][1]. They interviewed some of the Microsoft employees who worked on the various sounds, and included archival tape of Eno being interviewed by the BBC about the Windows 95 sound. (It looks like the BBC interview may be the primary source for this SF Gate Q&A.)

[0] https://www.20k.org/episodes/tadaitswindows

[1] https://www.20k.org/episodes/windowslogonwav