Amaj7b5 guitar chord
Root, third and seventh: the guide tones fix the quality, so the fifth is dropped. That is what leaves a string free, so pick a tension to put on top.
- Tap a note to hear it
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- Fingers, notes or intervals
- Play the chord
About Amaj7b5 — shell voicings
Amaj7b5 is A, C#, Eb and G# — Amaj7 with the fifth lowered a semitone.
It sounds hollow and hard to place. Far more often met spelled the other way round, as a ♯11 over a chord that kept its fifth.
Amaj7b5 notes and formula
| A | C# | Eb | G# |
|---|---|---|---|
| 1 | 3 | ♭5 | 7 |
Coloured tonic — rare, and unstable for a major chord.
Also written AM7b5, AΔ7b5 or Amaj7(b5). The same chord either way; which spelling you meet depends on who wrote the chart.
How to play Amaj7b5
Root, third and seventh. The third and seventh, the guide tones, are what make the chord major, minor or dominant, so the fifth can go: it says nothing the symbol needs.
Three notes means a spare string, which is the real point. Put a tension on it.
Amaj7b5 has 5 of them, on the middle four strings, strings 6-4-3-2, the bottom four strings, strings 5-3-2-1 and the top four strings, from the 4th fret up to the 11th — all in one inversion, so the bass note never moves. The one to learn first is the A shape at the 4th fret, which is the easiest grip here.
Start with x01124 — no barre and 1 open string. 2 of the 7 shapes here sit in open position. 2 of the 7 need a barre. Together they cover the neck from the 1st fret to the 14th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| x01124 | open position | A, root position | G# | 1 open string |
| x01224 | open position | A, root position | G# | 1 open string |
| 546644 | 4th fret | A, root position | G# | barred |
| 5666x5 | 5th fret | A, root position | A | barred |
| xx7899 | 7th fret | A, root position | C# | all fretted |
| x-12-11-13-14-11 | 11th fret | A, root position | Eb | all fretted |
| x-12-13-13-14-x | 12th fret | A, root position | C# | all fretted |
The same notes rebuilt from scratch give 13 drop 2, 8 drop 3 and 1 open string voicings, each on its own page.
Tensions. A shell of Amaj7b5, root, third and seventh, leaves a string free, and the tones that belong over it are the 9 (B) and the 13 (F#).
How to use Amaj7b5
How you get to it. The turn that lands on Amaj7b5 is Bm7 to E7 — the ii and the V of A — and E7 shares its third and seventh with Bm7, so the hand barely moves between them.
In which keys. Every note of Amaj7b5 belongs to C# minor (the ♭VI) and E major (the IV, the subdominant).
What to play over Amaj7b5
Every note of Amaj7b5 is in A lydian.
Chords near Amaj7b5
Change one note of Amaj7b5 and you have Amaj7 (the flat fifth becomes a fifth), Amaj7#5 (the flat fifth becomes a sharp fifth), AmMaj7b5 (the major third becomes a minor third), A7b5 (the major seventh becomes a flat seventh) or A/G# (the flat fifth becomes a fifth).
Amaj7b5 is a major chord — root, major third, fifth. Major chords on every root.
On Amaj7b5’s sound and use this page follows Robert Rawlins & Nor Eddine Bahha, Jazzology (Hal Leonard, 2005). The shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.