By Kagen Schaefer, a guy who evidently likes to play with his wood. Front: Back: Organ pipes. Air connectors connect from the small drawers in the back of the desk to the organ pipes in the front of the desk. The pnumatic logic board. This is an air powered computer. It reads eight different sources of airflow which enter through the pipes on the top. The screws are adjusted to program the computer to accept any sequence, or tune. When the correct tune is played, air is allowed into this mechanism called the pendulum lock. This triggers a secret part of the desk to open up. All large drawers have puzzles inside. You will need to solve these puzzles to open other drawers or find secret compartments. Unlocked and open desk. Source.