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SCHOOL OF SCALES

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TETRACHORDS

Explore a system of colour-coded tetrachords (four note mini-scales)!

www.fourtonalities.com/tetrachords

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SCALE MACHINE V1

Combine two tetrachords to create four heptatonic scales!

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SCALE MACHINE V2

Combine 16 tetrachords to create 256 heptatonic scales!

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SCALE MACHINE V3

Combine 26 tetrachords to create 676 "scales"!

The 26 tetrachords are required to create the 266 heptatonic scales

(without an interval greater than an augmented 2nd / three semitones).

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PARENT SCALES

Heptatonic scales come in groups of seven modes, called a "Modal Class"

One of these modes can be selected as the "Parent Scale"  to aid learning!

Eight Parent Scales serve as a template to learn 266 heptatonic scales (per key)!

www.fourtonalities.com/parent-scales

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56 MODES

Explore and listen to the 56 modes of the Eight Parent Scales (seven modes each)

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56 MODES

Explore and listen to the 56 modes of the Eight Parent Scales (seven modes each)

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SCALE INVERSIONS

Each scale, when reversed, is another scale!

This concept is related to Parent Scales and Negative Harmony.

Six heptatonic scales (without an interval greater than an augmented 2nd / three semitones) are palindromic (self-inverse) .

The six self-inverse scales are created by the six tetrachords with a Perfect 4th.

www.fourtonalities.com/scale-inversions

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Exploring teaching and learning through a co-created virtual sandbox environment.

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