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Chartwell/Books/Music/Theory/mode_rules.txt

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Mode Interval Definitions
A whole step (W) equals 2 semitones. A half step (H) equals 1 semitone.
Scale Construction Rule
To construct any mode, begin on a root note and apply the interval formula step by step in sequence. Each interval determines the distance to the next note in the scale.
Ionian Mode (Major Scale)
The Ionian mode follows the interval pattern W W H W W W H. It is the standard major scale.
Example: C Ionian = C D E F G A B.
Dorian Mode
The Dorian mode follows the interval pattern W H W W W H W. It is a minor-type scale with a raised sixth compared to the natural minor scale.
Example: D Dorian = D E F G A B C.
Phrygian Mode
The Phrygian mode follows the interval pattern H W W W H W W. It is a minor-type scale with a lowered second, giving it a darker sound.
Example: E Phrygian = E F G A B C D.
Lydian Mode
The Lydian mode follows the interval pattern W W W H W W H. It is a major-type scale with a raised fourth.
Example: F Lydian = F G A B C D E.
Mixolydian Mode
The Mixolydian mode follows the interval pattern W W H W W H W. It is a major-type scale with a lowered seventh.
Example: G Mixolydian = G A B C D E F.
Aeolian Mode (Natural Minor)
The Aeolian mode follows the interval pattern W H W W H W W. It is the natural minor scale.
Example: A Aeolian = A B C D E F G.
Locrian Mode
The Locrian mode follows the interval pattern H W W H W W W. It is a diminished-type scale with a lowered second and lowered fifth.
Example: B Locrian = B C D E F G A.