I think one of Dr. Z students spoke on this. (not Polight but another brother...cant recall his name).
you have 6 solfeggio frequencies which are:
The Six Solfeggio Frequencies include:
UT β 396 Hz β
RE β 417 Hz β
MI β 528 Hz β
FA β 639 Hz β
SOL β 741 Hz β
LA β 852 Hz β
It coincides with the musical scale. (ironically its relative to the producer who will set a tempo (really a frequencys at a certain range) that resonate with the DNA this is what biochemist have been using. Cymatics
You mention Nikola Tesla who had a quote that states: "If you only knew the magnificence of the 3, 6 and 9, then you would have a key to the universe." In what is called Vortex Mathematic you have 3 groups which are called Family Number Groups.
this is broken down
FNGs are simply digits separated by 3βs. Start with the first number β1β and add 3, you get β4β. Add 3 to 4 and you get β7β; add 3 to 7 and you are back to 1.
1, 4 and 7 then, are the first Family Number Group.
Start now with β2β and add 3, it equals β5β; add 3 to 5 and you get β8β. 2, 5 and 8 then, are the second FNG. Whatβs left? 3, 6 and 9, all separated by 3 movements.
Also worth pointing out is that there are only four movements between numbers; addition (+), subtraction (-), division (Γ·) and multiplication (x). Of these four movements, 2 groups can be defined; addition (forward)\subtraction (backward) and multiplication (forward)\division (backward).
that much more but
this pertains to the golden ratio as well