In Backrooms: Escape the Yellow Rooms , the goal is to turn off the haunting waltz music to progress, so there usually isn’t a separate “music off” setting for that part of the game.

If you mean general game audio in a Backrooms game, try these quick checks:

  1. Open the in-game settings and lower or mute the Music volume.
  2. If there’s no music slider, mute the game from your system’s volume mixer.
  3. Make sure the game is using the correct audio output device in your sound settings.
  4. If audio is buggy, verify the game files or reinstall it.

So the likely answer is: you can’t safely turn off the required music in that specific puzzle without affecting progression.