You're thinking of the maze on Selenetic Island, which comes later. jandrese was referring to the puzzle in the rocket ship on Myst Island, which required the player to play notes on a piano, turn around, and set sliders to play the same notes. This puzzle was a prerequisite to reaching the maze you were thinking of.

Ah, yes. That one is annoying, indeed. For the keyboard, on at least one playthrough, I think I counted the number of slider positions so you could solve it by the index of the keys on the keyboard.

Still easier than the sound puzzle in Myst IV Revelation though! That required reading a guide to solve it was so unobvious.