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Is there a secret to this room, where you can subject a chair to the speakers? or is it just there for amusement?
If you mean the room where My Dark Disquiet plays, it's generally considered an Easter egg/part of the Poets of the Fall collaboration, but that area also has this: https://www.gamespot.com/articles/the-first-three-people-to-solve-this-control-puzzle-got-a-real-world-prize/1100-6469718/