Harmony & Geometry

About previous discussions and describing the relationship between music and geometry,

must say about harmony and how showing it in a circle,

For example you want say a chord, try to connect your notes for that chord together, on circle;

You can find many of attractive things on music by this way, for example, related chords! When you draw two related chords in one circle, you can see they have symmetries by a line in circle,

or an equilateral triangle make augmented triads,

Isosceles triangle can make diminished chords and Sus, what is difference between Major & minor…

Cmaj(C-G-E):

Cmi(C-G-D#) :

You can expanse this role for other chords as froths, fifths…Try and discover new rules!

(C7)

( Cmi7)

(CMaj7)