There should be no mystery about the cross-coherency of experiencing sound and color ; both experiences as the direct result of frequency vibrations of "living" energy.

Just as musical scales repeat with each octave so too does
what we expereince as music repeat when vibrations are octaved-up to where they acheive what we experience as the color spectrum.
With this as a working metaphor one can begin to grasp experiencing "life" itself at higher frequencies that our low-frequency physics body-based conciousness are too dull to register as applicable exerience.
That's where *intuition* informs *aesthetics*; the 7th sense.
( well ,perhaps 6.5 sense ;-)