I've recently found that the ratio of the arc length of the unit sine wave to
the x-traverse,
1.2160067+, which is closely the ratio of a remen to a foot also, is part of the
deep basis
of the biorhythms--the day-cycle numbers pair off to
28/23 (28=female=arc length unit sine wave of 23=male=straight=xtraverse)=1.217+
while analogously 40/33 =1.2121+, so we have a pair of minor thirds, typical
natural
mating call notes with birds, spaced by a tritone since 33/23 about=40/28 about
=
1.414+. Taken together, the four cycles make approximately an A dimished 7th
chord
when the cycles in days are octavally shifted into hearing range.

Michael