And for people who understand music theory (not me), they could
Implement the fancy stuff like the arcs that go between notes

Or could be used in a turn-based game, where actions are presented as beats

For people living of that calendar, they might have tricks of “an odd number of cycles means it change to the other”

Ah, you see if this actually a really common form of intimidation for wild post ladies. This seemingly well meaning comment actually means that she is going to crumple the next cardboard box intended for you by jamming it into the mail slot o7

ISAT, OMORI, Look Outside come to mind

Oh cool! New coded message for selling ‘product’ just dropped