Utonal/Otonal question

I have a question regarding the Utonal/Otonal ratios after reading the
very interesting commentary by Margo Schulter and the recent posts by
Paul Erlich...

My question is perhaps a naive one... and I admit it's time to read my
"Genesis" again, but IS THE UTONAL SERIES something in nature?? or is it
an entire fabrication?

From what I think I am understanding, let's be moronically simplistic
for a moment and start on "middle C." Then your UTONAL ratios would
yield a C below then an F, then a C, then an Ab, then an F... your
"F-minor triad..."

But does this "inverse ratio" process really come from anything in
nature?? Of course the "minor triad" is up the Otonal series at 6:7:9,
but that has nothing to do with the Utonal, yes??

So does the Utonal ratio series really "mean" anything?? It seems there
is a kind of "descending series" from "difference tones," yes?? or does
this have no relation to it???

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Joseph Pehrson