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A7♯5 Chord: Guitar, Piano and Notes

The A7♯5 chord is a altered dominant seventh chord built on the root note A. Its notes are A, C♯, E♯ and G.

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Quality
Short answer

Dominant seventh sharp five chords sound restless and a little exotic. Raising the fifth of a dominant seventh trades its usual bluesy pull for a sharper, whole-tone edge, a colour jazz and gospel players reach for right before a cadence.

Notes
A · C♯ · E♯ · G
Formula
1 · 3 · ♯5 · ♭7
Semitones
0 · 4 · 8 · 10
Note
A
Quality
Dominant 7♯5
Symbol
A7♯5

A7♯5 on piano

4 notes
View:
Piano diagram of the A7♯5 chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

To play A7♯5 on piano, place your right hand with your thumb on A, index finger on C♯, middle finger on E♯ and little finger on G. Press the keys together and listen for an even sound. On the keyboard C♯ is a black key and A, E♯ and G are white. E♯ is the key you'd normally call F. Practice moving in and out of the chord slowly, then bring in a metronome.

  • A1
  • C♯3
  • E♯♯5
  • G♭7

A7♯5 on guitar

View:
Guitar chord diagram of the A7♯5 chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

On guitar, A7♯5 is commonly played with the voicing shown above. The fretted notes sit between frets 2 and 5. Strings 5 and 3 ring open.

A · C♯ · E♯ · G

Play A7♯5 on the online piano

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A7♯5 chord notes

DegreeIntervalSemitonesNoteHear
1Root0A
3Major third4C♯(C#)
♯5Augmented fifth8E♯(E#)
♭7Minor seventh10G

How to use the A7♯5 chord

The A7♯5 chord is built from a root, a major third, an augmented fifth and a minor seventh. Start at the root A and stack the intervals to get the whole chord: A, C♯, E♯ and G. The same formula gives you the chord in any other key.

Dominant seventh sharp five chords turn up in jazz and gospel as an altered V7 resolving to the tonic, especially where the melody climbs through the raised fifth. They are a common sound in turnarounds right before landing back on I.

How A7♯5 differs from similar chords

A7♯5 is A7 with the fifth raised by a half step, and that raised fifth is the only difference. Seen from the other side, it is A+ with a minor seventh added. All four of its notes belong to the whole-tone scale, which gives it a floating, restless pull.

Where A7♯5 is used

A dominant chord wants to resolve. Its home is the V of a major key - and the I of a blues, where the pull never lets up.

As the VD major
  1. ii7Em7
  2. V7♯5A7♯5
  3. Imaj7Dmaj7

A7♯5 is the chord that wants to resolve, so ending the loop on it hands straight back to the top.

Questions people ask

What notes are in the A7♯5 chord?
The A7♯5 chord contains A, C♯, E♯ and G (A, C#, E# and G in plain text).
Is the A7♯5 chord major or minor?
A7♯5 is a altered dominant seventh chord. Dominant seventh sharp five chords sound restless and a little exotic. Raising the fifth of a dominant seventh trades its usual bluesy pull for a sharper, whole-tone edge, a colour jazz and gospel players reach for right before a cadence.
How do you play A7♯5 on piano?
Place your fingers on A, C♯, E♯ and G and play them together. The root usually goes to the little finger of the left hand, the upper notes to the right. On the keyboard C♯ is a black key and A, E♯ and G are white. E♯ is the key you'd normally call F.
How do you play A7♯5 on guitar?
Use the fingering in the diagram above. The fretted notes sit between frets 2 and 5. Strings 5 and 3 ring open.
What chords work well with A7♯5?
A7♯5 pairs naturally with the chords in the related section: a perfect fifth up or down, the relative major or minor, and anything sharing two notes with it.