What I've come to realise is that 432Hz and 440Hz both resemble the A.C. for 432Hz and D.C for 440Hz.
Nikola Tesla came up with the A.C. and it had no EMF, based on the electricity flowing harmoniously, while D.C. lights for example, flickers the flow of the electricity which creates EMF as a byproduct.
Maybe 440Hz and D.C. has been the main things to be pushed around simply to create more mind-control.