A# Locrian scale
- Notes
- A# B C# D# E F# G#
- Formula
- 1 b2 b3 4 b5 b6 b7
- Steps
- H W W H W W W (W tone, H semitone)
- Also called
- A# Locrian mode
- Also written
- Bb Locrian: Bb Cb Db Eb Fb Gb Ab
Seven notes from A# up to the next A#. Each note is written with the letter its degree names, one letter each, so the spelling follows the formula.
A# Locrian on the piano
From A#4 to A#5, the root in blue-green.
Intervals from A#
| Note | Degree | Interval | Semitones |
|---|---|---|---|
| A# | 1 | root | 0 |
| B | b2 | minor second | 1 |
| C# | b3 | minor third | 3 |
| D# | 4 | perfect fourth | 5 |
| E | b5 | diminished fifth | 6 |
| F# | b6 | minor sixth | 8 |
| G# | b7 | minor seventh | 10 |
A# Locrian on the guitar
Standard tuning, high e on top as in tablature, open strings to fret 12. Every dot is a note of the scale; the pattern repeats from fret 12 up.
The seven chords of A# Locrian
Every other note of the scale stacked on each note. Numerals are measured against the major scale on A#, so a b marks a chord root a semitone lower than in major.
| Numeral | Chord | Notes | Sound |
|---|---|---|---|
| i° | A#dim | A# C# E | |
| bII | B | B D# F# | |
| biii | C#m | C# E G# | |
| iv | D#m (same notes, spelled Ebm on its chord page) | D# F# A# | |
| bV | E | E G# B | |
| bVI | F# | F# A# C# | |
| bvii | G#m | G# B D# |
Seventh chords
Same notes, different home note
A# Locrian uses exactly the same notes as C# Dorian, D# Phrygian, E Lydian, F# Mixolydian, G# natural minor and B major. What changes is the note the music keeps returning to, and with it which chord sounds like home.
Same notes as the key of B major: the chords are the same seven, but with A# as home.
How A# Locrian is built
Locrian has a minor 2nd and a diminished 5th: against Bb natural minor, C becomes B and F becomes E. It has the same notes as B major, played from its 7th note. Because its 5th is flattened, the chord on its root is diminished (A#dim), which is unstable, so whole songs are rarely in Locrian. Jazz players use it over the half-diminished chord A#m7b5.
Played some notes and not sure which scale they come from? The scale finder listens to the piano, a MIDI keyboard or the microphone and ranks all 180 scales.
What this page cannot do
- One spelling per scale. Bb Locrian is the same sounds written from Bb; the root is spelled the way that needs the fewest sharps and flats.
- Equal temperament only. Blues and many folk traditions bend notes between these pitches, and Arabic and Turkish maqam scales use quarter tones that a piano cannot play.
- The guitar diagram shows standard tuning only and does not suggest fingerings; any note can be played in several places.
- The sound is a simple synthesised tone made in your browser, not a recorded instrument.