A Dominant 7th Sharp Fifth

Symbols:A7#5
Scale Degree Formula:1-3-#5-♭7
Interval Stack:M3 + M3 + M2
Notes:A, C#, F, G
Hear this chord:▸ Synth

Construction

Using the scale degree formula, we first start with the A major scale, and number each note in the scale starting from 1 - these are the scale degrees. Next, we use the scale degree formula, in this case 1-3-#5-♭7, to select notes from our enumerated scale. When a chord requires notes that are not in the scale, this is indicated with a flat (♭) or a sharp (#) along with the scale degree; a ♭3, for instance, would be one half-step down from the 3rd scale degree.
Alternatively, we can use the interval stack to construct our chord. With this approach, we first start with the root of the chord (A), then move our first interval (M3), which brings us to our second note in the chord (C#). We repeatedly apply each of the remaining intervals in the stack to get the full list of notes for our chord.
The diagram below shows how both the scale degree formula and interval stack methods result in the same selection of notes:
A1Bb♭2B2C♭3C#3D4D#♭5E5F#5F#6G♭7M3M3M2

Similar Chords

The following chords are similar to this chord and may be a suitable replacement in certain scenarios.

Chord TypeChords
7th Suspended SecondG7sus2
Added 9thFadd9
AugmentedFaug, C#aug, Aaug
Augmented Major 7thF+Maj7, C#+Maj7, A+Maj7
Dominant 7thA7
Dominant 7th Flat FifthG7b5, D#7b5, C#7b5, A7b5
Dominant 7th Flat ThirteenthA7b13
Dominant 7th Sharp Five Flat 9thA7#5b9
Dominant 7th Sharp Five Sharp 9thA7#5#9
Dominant 9th Flat FifthG9b5, D#9b5
Dominant 9th Sharp FifthF9#5, A9#5
Half-Diminished 7thGm7(b5)
Major 2ndF2
Major 7th Flat FifthC#Maj7b5
Minor 6thBbm6
Minor 9th Flat FifthGm9b5
Minor Added 11thDmadd11
Minor Major 7thF#mM7, DmM7, BbmM7

Associated Scales

This chord can be found in the following scales.

ScaleRoots
Dorian b5G
Harmonic MajorF
Harmonic MinorD
Ionian #5F
Locrian bb7E
Locrian ♮6E
Lydian #9Bb
Lydian Augmented #2C#
Lydian b3Bb
Mixolydian b2C
Phrygian DominantA
Phrygian b4A
Super-Locrian bb7C#
Ukrainian DorianG

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