TWO UNIVERSES BACK TO BACK
(The direction of a current is counterclock-wise from negative to positive)

Angles and wave lengths are determined for each note. The shape becomes a yin yang.
It is the note Fa which finally achieves this shape. The note Fa is the beginning of the circle of fifths in music. It is #1 in the sequence of Chinese symbols in the Hexagrams of the I Ching...