All of the tangible world is in motion, a motion that has a structure, and as a higher species we can detect this. Tribes pound away at their drums and you cannot help but feel a need to move, to think a certain way. The Universe seems to have an affinity for mathematics, the truth of 2 plus 2 is always 4. Philosophy dictates that the basis of truth is in math. Music, beat, rhythm and dance are all founded in that same idea.
Music is like color, or weather or physics.
We can all produce it, experience it and understand it at an emotional level and a physical level and never realize the dynamics of the mathematical monuments that are being played out for us. There are laws and constructs in music that must be followed. Scales and chords and harmonies follow strict guidelines that people had been following themselves for centuries but never knew it. The monks were the first to uncover the system that music adheres to, then composers and scholars followed and gave us a way of seeing music on paper. Like the periodic table, there was an order to things that could be written down and analyzed.