Longhorn was the codename for Microsoft's major Windows release in development between 2003 and 2006, before a development reset led to Windows Vista. Its startup and system sounds circulated among beta testers and enthusiasts through leaked builds and forums. While the final Vista sound was composed by Robert Fripp, the Longhorn sounds retained a cult following as symbols of features and designs that never shipped. Clips like this one-second chime spread on soundboards and YouTube compilations dedicated to preserving beta operating system history.