Near Eastern notation used from c. 1200 to 1800, and still used in the Armenian Orthodox Church today.

Brian Eno’s score for Music for Airports:

Which sounds like this:

“Miniwanka” by R. Murray Schafer:

Voice Piece for Soprano by Yoko Ono:

Which sounds like this:

One composer saw this:

and heard this:

What does this sound like?

Here are some interesting directions in various scores, but unfortunately we don’t hear them played: