Daniel entered the room of requirements. He had missed this room. He once used it as a kitchen, and then as a practice area for his piano skills.

Now he wanted solitude. And then he opened this door and found a grand piano in the middle of the room. The room is really very intelligent. Solitude and relaxation, as Daniel recalled, was found when he is playing the piano.

He sat at the piano stool and opened he keys. He then started to play the tune written by a muggle composer. It is entitled, "Moonlight Sonata"