The modes of the major scale are alternative scale systems created by treating each scale degree of the major scale as a tonal center. Each mode uses the same seven pitches as its parent major scale, but the change in tonal center alters interval relationships and functional behavior.
Modes are not new scales in terms of pitch content. They are new organizations of the same pitch collection.
How Modes Are Derived
Each mode is formed by starting the major scale on a different scale degree and maintaining the same sequence of notes.
For example, the C major scale contains:
C, D, E, F, G, A, B
If D is treated as the tonic, the resulting mode is D Dorian:
D, E, F, G, A, B, C
The pitch content remains unchanged. The tonal center and functional hierarchy change.
The Seven Modes of the Major Scale
Ionian
Ionian is the major scale itself.
Interval structure relative to the tonic:
major second
major third
perfect fourth
perfect fifth
major sixth
major seventh
Ionian functions as the primary reference mode in Western tonal music.
Dorian
Dorian is a minor mode with a raised sixth.
Relative to the major scale, it contains:
minor third
major sixth
minor seventh
Dorian balances minor tonality with brighter melodic motion due to the raised sixth.
Phrygian
Phrygian is a minor mode with a lowered second.
Its defining feature is the half step between the tonic and second scale degree.
This creates strong tension near the tonal center and a distinctive melodic character.
Lydian
Lydian is a major mode with a raised fourth.
The raised fourth removes the half step between the third and fourth degrees found in the major scale, creating a floating or unstable quality.
Lydian has a weakened sense of dominant pull compared to Ionian.
Mixolydian
Mixolydian is a major mode with a lowered seventh.
The absence of a leading tone reduces harmonic resolution and gives Mixolydian a more open tonal character.
Aeolian
Aeolian is the natural minor scale.
It contains:
minor third
minor sixth
minor seventh
Aeolian functions as the foundation of minor key tonality.
Locrian
Locrian is the most unstable mode.
It features:
minor second
diminished fifth
The diminished fifth above the tonic weakens tonal stability, making Locrian rare in functional harmony.
Modal Interval Comparison
Each mode can be understood by comparing it to either the major or natural minor scale.
Relative to major:
Dorian has a lowered third and seventh
Phrygian has a lowered second, third, sixth, and seventh
Lydian has a raised fourth
Mixolydian has a lowered seventh
Relative to natural minor:
Dorian has a raised sixth
Phrygian has a lowered second
Aeolian matches natural minor
This comparison approach is more practical than memorizing note sequences.
Tonal Center and Modal Function
Modes do not rely on functional dominant harmony in the same way major and minor keys do.
Instead, modal music emphasizes:
pedal tones
characteristic scale degrees
melodic repetition
harmonic stasis
The sense of center comes from emphasis rather than resolution.
Modes vs Keys
A key implies functional harmony and modulation. A mode implies a pitch collection with a stable center but limited functional hierarchy.
Music can shift between modal and tonal thinking depending on harmonic behavior.
