About the B flat augmented suspended four chord
B flat augmented suspended four is used in E♭ Dorian, where its notes spell the i chord. Think of it as a B♭ augmented suspended fourth chord.
Its notes are B♭, E♭, and F♯. The intervals are a perfect fourth and an augmented fifth.
Also called A sharp augmented suspended four, which spells the same notes enharmonically. In shorthand it is commonly written Bbaugsus4.
Positions
No stored guitar shape for this voicing yet. Build it from B♭, E♭, F♯.
Notes and intervals
| 1 | B flat | Root |
|---|---|---|
| 2 | E flat | Perfect 4th |
| 3 | F sharp | Augmented 5th |
Shapes
Chromatic
Circle of Fifths
Keys that use B flat augmented suspended four
B flat augmented suspended four is diatonic to these keys, where its notes spell the chord shown.
iE flat Dorian scaleiE flat Phrygian scaleiE flat Natural Minor scaleiE flat Harmonic Minor scaleiE flat Melodic Minor Ascending scaleiE flat Dorian ♭2 scaleiE flat Dorian ♯4 scaleiE flat Phrygian ♭4 scaleiE flat Lydian Diminished scaleiiD flat Major scaleiiD flat Dorian scaleiiD flat Mixolydian scale
Other B flat chords
Simpler triads
Suspended
B flat suspended two chordB flat suspended four chordB flat seven suspended four chordB flat nine suspended four chordB flat thirteen suspended four chord
Sixths and sevenths
B flat six chordB flat minor six chordB flat minor flat six chordB flat seven chordB flat major seven chordB flat minor seven chordB flat minor seven flat five chordB flat diminished seven chordB flat minor major seven chordB flat major seven flat five chordB flat major seven sharp five chordB flat minor major seven flat five chord
Extensions
B flat nine chordB flat add nine chordB flat major nine chordB flat minor nine chordB flat eleven chordB flat thirteen chordB flat six nine chordB flat minor add nine chordB flat major eleven chordB flat major thirteen chordB flat minor eleven chordB flat minor thirteen chordB flat minor six nine chordB flat minor major nine chordB flat minor major eleven chord
Altered
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