Describing subjective art with numbers means it's objectively good now! No. >.<

Math, and even merely counting, as applied to the real world always has a human element intangled with it, even though people like to pretend otherwise. Like, you can't count apples without first deciding what an apple is, where the boundaries of that category are, and declaring them all to be equivalent for your purposes (e.g. one fresh apple = one barely still edible apple). The abstraction of it adds subjectivity.

Anyway the relationship of math with music is interesting nonetheless. It just doesn't have to be about making art objective somehow.