The room contains two music racks with the sheets for "The Lighter Side of Hell", a window screen, and a microphone hanging from the ceiling. It is next to the recording studio, though the door to the room is on the opposite side of itself.
The room is not accessible, and there is no gameplay in it.
This room is only accessible using teleport hacks, and one can see the ending of this chapter on the other side of the door. The door can be opened where the Wandering Sin cutout can be found.
- From Chapter 2's first release before Chapter 3's release, the window for the recording booth was not there. It also did not have a room on the other side of the door to reveal the Wandering Sin cutout.