This chime comes from a stock quiz sound library, labelled as a fast ding-dong for correct answers, and it is credited to OtoLogic. Unlike a sound tied to one television show, it has spread because creators can drop it into any quiz, trivia or guessing format without needing a recognisable clip. Its short length and clear two-note pattern make it instantly readable, even on a phone speaker, which is why it keeps appearing in short-form quizzes, classroom games and reaction edits where a right answer needs to land quickly.