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A key centre is harmonically defined by two
elements.
- 1. A scale (the "Parent" scale) and...
- 2. A set or family of chords occurring
within the parent scale.
Tonalitys are usually either
MAJOR or
MINOR.
MAJOR
tonalities (key centres) are defined by the
major scale and the family of chords (scale
tone chords) occurring within it.
MINOR
tonalities are defined by the "pure" minor
(aeolian), melodic minor, or harmonic
minor scales.
Major and Minor tonalities which share a common key
signature are "related". e.g. - C major/A
minor, B major/G# minor, etc...
i.e. - C major is the relative major of A minor and
A minor is the relative minor of C major.
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Note the use of Roman Numerals in ex.1 - 4. All
parent scales contain chords
I,
II,
III,
IV,
V, VI
&
VII.
Practice the following excercises (ex.5 - 8) in all
keys in order to gain familiarity with major and
minor tonalities.
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