root position: Bbaug
B♭ – D – F♯ · RH 1-3-5, LH 5-3-1
The B flat augmented chord (B♭aug) is made of the notes B♭, D and F♯. Its formula is 1 – 3 – ♯5.
| Note | Formula | Interval from root |
|---|---|---|
| B♭ | 1 | root |
| D | 3 | major 3rd |
| F♯ | ♯5 | augmented 5th |
Fingers are numbered from the thumb (1) to the little finger (5).
B♭ – D – F♯ · RH 1-3-5, LH 5-3-1
D – F♯ – B♭ · RH 1-2-5, LH 5-3-1
F♯ – B♭ – D · RH 1-3-5, LH 5-2-1
B♭aug is also written as B♭aug, Bb+, B♭+, Bb#5, B♭♯5, A#aug, A♯aug, A#+, A♯+, A##5, A♯♯5.
B♭aug is not one of the basic chords of any major or minor key. It is usually used as a passing or colour chord.