This sound comes from Phasmophobia, the cooperative horror game released in early access in 2020 by Kinetic Games, in which teams investigate haunted buildings for ghost activity. The music box tune is closely linked to ghost hunts and tense investigation moments, which made it instantly recognisable to players watching streams and gameplay clips online. As horror creators reused the melody in edits, memes and short-form videos, it became a shorthand for approaching danger without showing a monster. It remains popular because its innocent sound clashes with the fear it signals.