The sound comes from tada.wav, the fanfare included with Windows 3.1, released by Microsoft in 1992, and also used in the NT 3.x line. It played when users assigned it to system events in the early graphical Windows era, long before modern notification sounds. As retro computing clips, tutorials and meme edits spread online, the short flourish was kept alive as an instantly recognisable marker of old PC culture. Its association with error soundss and other classic system noises helps explain why creators still reach for it for reveals.