A♭7♭5
Character: edgy
- A♭Rtriad
- C3triad
- E𝄫♭5triad
- G♭♭7add
8 ways to play A♭7♭5
Every voicing sits inside one of the five CAGED shapes, low to high on the neck, with its octave doublings in grey.
- Triad note
- Substitute
- Added
- Anchored root
- Bass
- Doubling
Frets x 9 10 7 9 xNotes G♭ C E𝄫 A♭Intervals ♭7 3 ♭5 1
The ♭7th gets a string of its own.
Frets 10 11 10 11 x xNotes E𝄫 A♭ C G♭Intervals ♭5 1 3 ♭7
The ♭7th gets a string of its own.
Frets x x 0 1 1 2Notes E𝄫 A♭ C G♭Intervals ♭5 1 3 ♭7
The ♭7th gets a string of its own.
Frets 2 3 0 1 x xNotes G♭ C E𝄫 A♭Intervals ♭7 3 ♭5 1
The ♭7th gets a string of its own.
Frets x x 4 5 3 4Notes G♭ C E𝄫 A♭Intervals ♭7 3 ♭5 1
The ♭7th gets a string of its own.
Frets 4 5 6 5 7 xNotes E𝄫 A♭ C G♭Intervals ♭5 1 3 ♭7
The ♭7th gets a string of its own.
Frets 4 5 4 5 x xNotes A♭ E𝄫 G♭ CIntervals 1 ♭5 ♭7 3
The root drops to the string below the triad. The ♭7th takes the root’s string.
Frets x x 6 7 7 8Notes A♭ E𝄫 G♭ CIntervals 1 ♭5 ♭7 3
The root drops to the string below the triad. The ♭7th takes the root’s string.
The construction rules A♭7♭5 follows
Start from a triad
Root, 3rd and 5th, stacked in thirds. The 3rd makes it major or minor; the 5th makes it diminished or augmented when it moves.
A third on top makes a 7th chord
A major 7th over a major triad is maj7, a ♭7 is a dominant 7. Over minor you get m7 or m(maj7); over diminished, m7♭5 or the °7, whose 7th is lowered twice.
On guitar, something has to give
Each extension takes the string of a triad note that matters less, usually the 5th, or gets a string of its own. The root and 3rd stay: they say what the chord is.
The root can move down
When an extension needs the root’s string, the root can drop to the string below the triad: an anchored voicing keeps the bass and frees a string on top.
Alter a dominant for tension
Raise or lower the 5th or the 9th, or add a ♯11 or ♭13, and a dominant 7th pulls harder towards the next chord: G7♯9, G7♭9, G7♭13.
All the rules, with examples, in the guide to the chord library.
Dominant 7th ♭5 in every key
More chords on A♭
A♭7♭5 chord questions
What notes are in A♭7♭5?
A♭7♭5 is spelled A♭ C E𝄫 G♭: A♭ is the root, C is the 3rd, E𝄫 is the ♭5th, G♭ is the ♭7th.
What is the formula of A♭7♭5?
1 3 ♭5 ♭7. It is a A♭ triad triad with the ♭7th stacked on top.
How many ways can you play A♭7♭5 on guitar?
This page shows 8 voicings of A♭7♭5, filed under the five CAGED shapes and named by inversion, from the open position up to the 16th fret.