In this
interesting twist, we do not utilize to major chords 1M 4M 5M but the power
2-notes 3 voices chords 1P 4P 5P . Where 1P=1-5-1' , 4P=4-1-4" and
5P=5-1-5'
Similarly as in the
post 396 may substitute the 1P 4P 5P with relative
power chords like 2P 3P 6P 7P
Why we do it? Because
either if we are in the natural minor of the scale or the harmonic minor or the
double harmonic minor, the chords remain the same and we have stable harmonic
background with very rich melodic variations and transitions to other minor
chromatic scales.