In the close-up view, use the paper on the chest and Darren traces the musical notes. Then use the traced carving on the badly out-of-tune piano to set off a mini-game. It’s not as hard as it first looks. Only the middle eight keys on the piano are interactive. You have to play a sequence of eight notes and you can start with any of the left four keys. So if you were to start with the leftmost key and the keys were numbered 1-8 from left to right, you’d hit: 1, 3, 3, 2, 5, 3, 2, 3. The piano answers back. It produces one note three times, another twice and a third five times. And that is the combo for the lock on the chest: 3, 2, 5.