Harmonized Scale - Another View
The Circle of fifths for chords.
If you take a diminished chord and start building chords a 5th apart you get all the diatonic
chords for the key a 1/2 step up (7th down) from the diminished chord.
When you go up you get the two Major chords then the Dominant chord.
At the Dominant chord it changes to the three minor chords if you continue up.
If you go down you get the three minor chords then the Dominant chord.
At the Dominant chord it changes to the two Major chords.
The Circle of thirds for chords
Now let us take the minor chords and insert them next to their relative Majors..
As you can see the chords are now a third apart, and each minor chord is a third away from
a Major chord.
But the bottom three chords are a 9th, 11th and 13th from the chord at the top.
Intervals greater than an octave are difficult to recognize.
So let us move each of those three chords up one octave.
The Circle of sevenths for chords.
You now have the harmonized Major scale.
Each chord is now a seventh down (second up) from the other chord.
We will refer to these as adjacent chords.