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Sunday, January 27, 2019

151. Internal and external harmony of a chord in a scale and chords-melodies fitting

(this post has not been written completely yet)


We are used to think that the harmony of  chord are the intervals between its notes. Nevertheless this is only the internal harmony of  chord! The external harmony of the chord in scale is the structure of intervals between any note of the scale and the notes of the chord.

The degree of fit of melody to a chord is mainly based on the extenal hamony of each note of the melody relative to the chord.


And as there are good and bad internal harmonies for chord so there are good and bad external harmonies of chord relative to a scale.
We classify here some external harmonies based on the total harmonic score of the external intervals in post 40

In the next we will compare the external harmony in a major-mode diatonic scale of the I-step major chord, with the external harmony of the IV-step and V-step major chords.