Math in Music

I know that these two "sciences" seem to have nothing in common, but they seem to have more in common than we can imagine. Now I will present the proof of a theorem:

Music is the mathematics of the soul Music, the art that expresses with the help of sounds feelings and mental states, sounds combined melodically and harmoniously to be pleasing to the ear, appeared early in the history of culture; music disposed of man before articulating words, perhaps from the Paleolithic, certainly from the Neolithic.

2500 years ago, Pythagoras used an instrument called a monochord (a single vibrating string). which is analogous to the musical sound level meter is the result of regular vibrations of elastic bodies. Pythagoras also found that when it vibrates