That's exactly what I did when I played Myst.
One was the piano. At first, I heard the sounds. I then tried to duplicate the sounds, but I couldn't figure out the right keys. I just peeked in a strategy guide at a local bookstore for that one.
The other was the rotating platform. In order to rotate the platform properly, you have to be able to hear the pitch that determines when to stop. I barely got that one right.
I forgot all about that piano! That is quite a pain in you-know-what! I had to look up the answers in my favorite link: UHS: Hint Files It doesn't show all the answers right away. It gives you hint and you can ask for more hints until it give you answers. It is perfect if you get stuck in some game.