The jingle is the short announcement signal used on TGV high-speed services in France, played over the onboard speakers just before staff announcements about departures, stops and connections. Train passengers recognise it immediately, and rail fans have recorded and shared it for years, turning a functional station sound into a small cultural marker of French travel. Online it spread through travel vlogs, railway videos and edits that need an instant sense of place, and it remains popular because three seconds are enough to place a viewer on a French platform without any explanation.