Noel Johnston | Modal Etudes - 7 Modes of Harmonic Major @nohjoh08 | Uploaded December 2019 | Updated October 2024, 1 hour ago.
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Each etude was composed using only a single tonality/mode. The book "Modal Etudes" has 35 tonalities. Here are the 7 Harmonic-Major related ones:

The Harmonic Major tonalities are:
1. Harmonic Major (Major scale w/ a ♭6)
2. Locrian ♮2♮6
3. Superlocrian ♮5
4. Lydian-Minor (aka "Lydian Diminished" or Melodic Minor w/ a ♯4)
5. Mixolydian ♭2 (Phrygian w/ a maj3 & maj6th)
6. Lydian-Augmented #2
7. Locrian º7 (Locrian bb7)