In a fascinating new video, we not only get to hear the original Windows 8 startup sound (which was pulled), but we also learn that the first Surface PCs had a custom version that also never shipped. Both files are now available to download.

source https://www.windowscentral.com/hardware/laptops/this-is-the-never-before-heard-surface-startup-sound-as-well-as-the-missing-one-for-windows-8