Sound pitch is determined by the frequency of the sound waves. Short, fast waves produce high pitched sound and long, slow waves produce low pitched sound. This presents the idea that harmony is created by rhythm.
Watch Adam Neelys explanation of how pitch can be created by rhythm:
Harmonic Polyrhythms Explained! [ AN’s Bass Lessons #27 ]
Take some time to digest that concept, then take a look at how he applies those principles to create what he calls, “fractal music”:
Finally, this begs the question – if we can do this with music, can we also do it with light, where wave frequency determines color?