Hello group. I read the statement below, and was wondering if you
scholars would be kind enough to say whether it is true, and if so,
where I could learn more about it?

"When different frequency waves meeet, they add and multiply. Phi
permits waves to intersect in orderly, harmonic patterns...thus waves
of a different length form a stable nest. In electronics, this
is 'heterodyne', and is used to modulate radio and tv signals..."

Also (---going out on limb here!) could it be possible that there is
some sort of interaction of harmonics, almost like the interference
pattern referred to above, but at the level of harmonics, which is
involved with the perception of 'chord color'? I guess I'm sort of
thinking of that older theory of dissonance pertaining to coinciding
partials....

If this is all too murky to even respond to, I understand! It's just
that I sort of visualize chord color, like synthesia, and am trying to
understand it...

thanks, Kelly