A# Locrian Mode
A# – B – C# – D# – E – F# – G#
Formula:H-W-W-H-W-W-W
Intervals:P1-m2-m3-P4-d5-m6-m7-P8
Scale Degrees:1-♭2-♭3-4-♭5-♭6-♭7-8
Introduction
The A# Locrian mode is the seventh mode of the B Major scale. It has a diminished quality with flatted second and fifth degrees, the most dissonant of the seven modes.
A# Locrian Mode Notes
| Degree | Name | Note | Interval |
|---|---|---|---|
| 1 | Tonic | A#4 | P1 |
| ♭2 | Supertonic | B4 | m2 |
| ♭3 | Mediant | C#5 | m3 |
| 4 | Subdominant | D#5 | P4 |
| ♭5 | Dominant | E5 | d5 |
| ♭6 | Submediant | F#5 | m6 |
| ♭7 | Leading Tone | G#5 | m7 |
| 8 | Octave | A#5 | P8 |
A# Locrian Mode — Frequently Asked Questions
What notes are in the A# Locrian mode?
A# Locrian is the seventh mode of its parent major scale. The flatted 5th is the defining characteristic.
How is A# Locrian used in music?
A# Locrian has a unstable, dissonant, dark sound. Common in metal, progressive jazz.
What is the characteristic note of Locrian?
The flatted 5th distinguishes Locrian from other modes. This single note defines the mode's character.
What chords are built from A# Locrian?
Diatonic chords are built by stacking thirds from each scale degree. The characteristic chord highlights the mode's unique sound.
Practice Tips
- The flatted 5th is the Locrian signature — listen for it.
- Practice A# Locrian over appropriate chord vamps.
- Compare with parallel modes to hear the difference.
- Locrian is common in metal, progressive jazz.
- Learn the parent major scale relationship.
- Practice in all inversions and positions.