Sinister Music Box

Narrate a scenario where a seemingly innocent music box plays spine-chilling tunes each night past midnight.

This prompt entails building a suspenseful atmosphere using auditory elements. Why does the music box only play at midnight? What horrors are tied to its tunes? How does it affect the people around it? Delve into the associations with darkness, the supernatural, and the fear that commonly accompanies events that occur when most people are asleep.