A9(#5) Guitar Chord | Play, Hear and Practice Interactively
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The A ninth sharp five chord is usually written A9#5 and uses the notes A, C#, E#, G and B. The only voicing listed needs a barre.
The raised fifth leans upward, which gives the chord a bright but unsettled colour. The E# here is a theoretical spelling: it keeps one letter name for each chord tone, although it sounds like an easier note. A9#5 fits inside the A whole-tone scale: each of its notes is a member of that scale. The logic of stacking thirds is explained in how chords are built.
Start the drum loop in the practice tool at the top, choose a tempo and repeat the chord until it lands on the beat.
A 9th with sharp 5th guitar chord is also written as A9(#5), A9#5, A9+5 or Aaug9.
Notes that compose the A 9(#5) chord:
Chord structure of the Dominant Ninth Sharp Fifth chord:
Formula: 1 3 #5 b7 9
A 9(#5) Guitar Chord Diagrams
Position 1 Barre Movable
Finger Positions
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Created by
Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
What notes are in A9#5?
A9#5 is spelled A, C#, E#, G and B. That is a root, major third, raised fifth, minor seventh and ninth. The E# is the raised fifth, one semitone higher than E.
What do the intervals in A ninth sharp five mean?
Reading from A: C# is a major third, E# a raised fifth, G a minor seventh and B a ninth. The major third with the minor seventh gives a dominant character. The raised fifth tilts it upward.
How many ways are there to play A9#5?
A9#5 has one voicing, a barre voicing between fret 5 and fret 7. None of its voicings uses open strings.
Which scale suits A9#5?
The A Whole-Tone Scale (A, B, C#, D#, E#, G) holds every chord tone. The ninth B and the minor seventh G both belong to it.
