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The Aeolian mode is the sixth mode of the major scale, that is, it is formed by starting on the sixth degree of the major scale. For example, if the Aeolian mode is used in its all-white-note pitch based on A, this would be an A-minor triad, which would be the submediant in the relative major key of C major.
While the term "mode" is still most commonly understood to refer to Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, or Locrian modes in the diatonic scale; in modern music theory the word "mode" is also often used differently, to mean scales other than the diatonic.
Ignoring the root, the scales used for each of these four chords would be B Aeolian (natural minor), B Dorian, C♯ Mixolydian, and E Aeolian, respectively. However, from the perspective of pitch axis theory, we consider all scales to have the B root - so we would say that the progression is B Aeolian, B Dorian, B Lydian, and B Phrygian.
[4] The actual meaning of the term "Aeolian cadence" is that a major key song resolves on the vi chord, which is the tonic chord of the relative minor key (the Mahler ends on the major tonic with an "added 6th," not on a VI chord.) The term derives from the fact that the Aeolian mode is rooted on the sixth step of the major scale.
Within the diatonic modes of the major scale, in addition to the Aeolian mode (which is the natural minor scale), the Dorian mode and the Phrygian mode also fall under this definition. Conversely, the Locrian mode has a minor third, but a diminished fifth (thus containing a diminished triad ), and is therefore not commonly referred to as a ...
The Aeolian dominant scale (Aeolian ♯ 3 scale), Mixolydian ♭ 6 scale, descending melodic major scale, or Hindu scale [1] [2] is the fifth mode of the ascending melodic minor scale. It is named Aeolian dominant because its sound derives from having a dominant seventh chord on the tonic in the context of what is otherwise the Aeolian mode .
The additional four modes included authentic and plagal forms of Aeolian (modes 9 and 10) and Ionian (modes 11 and 12) — the modes equivalent to minor and major scales, respectively. Glarean went so far as to say that the Ionian mode was the one most frequently used by composers in his day. [8] The influence of his work was immense.
A plagal mode (from Greek πλάγιος 'oblique, sideways, athwart') [7] [8] has a range that includes the octave from the fourth below the final to the fifth above. The plagal modes are the even-numbered modes 2, 4, 6 and 8, and each takes its name from the corresponding odd-numbered authentic mode with the addition of the prefix "hypo-": Hypodorian, Hypophrygian, Hypolydian, and ...