The sound comes from the original PlayStation, Sony's first home console, released in Japan in 1994 and worldwide the following year. It played every time the machine was switched on, right before the Sony logo appeared, so millions of players heard it thousands of times while loading games. As retro gaming grew on YouTube and social media, the boot sequence became shorthand for 1990s gaming culture, appearing in nostalgia compilations, memes and remixes. Its lasting appeal comes from that instant recognition, a few seconds that signal a whole era of gaming.