How about chords? Melodies which are paths? Passwords? Lots of great potential here!

Password is 3rd movement of Moonlight Sonata without "typos".

	▲	iainctduncan 2 hours ago \| parent [-]
		nice... ;-) Funny how we don't hear that movement much...

vunderba 3 hours ago | parent | prev [-]

Goonies scene where they have to play a sequence correct to avoid triggering a trap: