If there's sense in the song (you can understand the song and the text makes sense) your mind might try to put up a scenario about the text, though if it is a song, where you can barely hear what the singer is singing, your mind will make up a scenario about what the song is bound to IE. James Bond. You hear the James Bond theme when watching the film, and your mind will be reminded of James Bond, as the theme starts. However, if you hear a theme for a game/film you've never played/seen, your mind will just put up a random scene or whatever fits with it, or just don't care about it. That's atleast what I've heard around