25 years ago, the now iconic PlayStation 1 startup sound entered into public consciousness. It?s a sweeping, thrilling tune, one perfectly indicative of the fun players were bound to have. Though fans look back on it as a nostalgic piece of PlayStation history, internally, it represented so much more than a cool sequence. Apparently, Sony used the startup sound as a way to inform users that the system itself and the disc drive were working properly.
The original startup sound?s composer, Takafumi Fujisawa, went into detail about this very topic in Game Informer?s extensive analysis of PlayStation?s 25-year history. According to Fujisawa,

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