Altered dominant
in E♭ major
Piano chord · also written A♯7♯5
B♭ Augmented 7th Piano Chord (B♭7♯5)
The B♭ Augmented 7th chord on piano is made of the notes B♭, D, F♯ and A♭. Bold and unresolved. An augmented triad with a dominant 7th.
Tap any key to hear it.
What notes are in B♭ Augmented 7th?
4 notes, built 1 – 3 – ♯5 – ♭7 up from B♭.
- Notes
- B♭ – D – F♯ – A♭
- Formula
- 1 – 3 – ♯5 – ♭7
- Semitones from the root
- 0 – 4 – 8 – 10
- Symbol
- B♭7♯5
- Same keys as
- A♯7♯5 (A♯ – D – F♯ – G♯)
- Chord type
- Augmented 7th, 4 notes
How to play B♭ Augmented 7th on piano
- Right hand: B♭ (1), D (2), F♯ (3), A♭ (5). Fingers 1 – 2 – 3 – 5, thumb on B♭.
- Left hand: B♭ (5), D (3), F♯ (2), A♭ (1). Fingers 5 – 3 – 2 – 1, little finger on B♭.
Fingers are numbered 1 (thumb) to 5 (little finger) on both hands.
B♭ Augmented 7th inversions
Each inversion puts a different note of the chord in the bass. Written as a slash chord: B♭7♯5/D, B♭7♯5/F♯, B♭7♯5/A♭.
Can you find B♭ Augmented 7th?
Tap the notes on the keyboard, then check. Six chords, starting with this one.
1 / 6 Tap the notes of B♭ Augmented 7th (B♭7♯5)
Score 0
Any octave, any order. Each key you tap plays.
B♭ Augmented 7th chord FAQ
What notes are in the B♭ Augmented 7th chord?
B♭ Augmented 7th (B♭7♯5) has 4 notes: B♭, D, F♯ and A♭. Its formula is 1 – 3 – ♯5 – ♭7, counted up from B♭.
How do you play B♭ Augmented 7th on the piano?
Put your right thumb on B♭ and play B♭, D, F♯ and A♭ with fingers 1 – 2 – 3 – 5. With the left hand, use fingers 5 – 3 – 2 – 1, little finger on B♭.
Is B♭ Augmented 7th the same as A♯ Augmented 7th?
On the piano, yes: A♯7♯5 (A♯, D, F♯, G♯) uses exactly the same keys as B♭7♯5 (B♭, D, F♯, A♭). Which name is used depends on the key of the piece; B♭7♯5 is the more common spelling.
What are the inversions of B♭ Augmented 7th?
1st inversion: D, F♯, A♭, B♭ (B♭7♯5/D). 2nd inversion: F♯, A♭, B♭, D (B♭7♯5/F♯). 3rd inversion: A♭, B♭, D, F♯ (B♭7♯5/A♭).