How about chords? Melodies which are paths? Passwords? Lots of great potential here!
Password is 3rd movement of Moonlight Sonata without "typos".
Goonies scene where they have to play a sequence correct to avoid triggering a trap:
https://www.youtube.com/watch?v=pUO7Ip0Xc10
Password is 3rd movement of Moonlight Sonata without "typos".