if you're the type of royalty who has a guy with a horn to signal your arrival to a place... y'know, to regular people, your arrival is an Event, it's worth dropping what you're doing to see which important person has just arrived.
But to you, the royalty in question? It's like the scene change stinger on a sitcom. It plays every time you're showing up somewhere. It's the Seinfeld Keyboard Guy to your strange royal life.