D 7th Suspended Fourth

Symbols:D7sus, D7sus4, D9sus4, D9sus
Scale Degree Formula:1-4-5-♭7
Interval Stack:P4 + M2 + m3
Notes:D, G, A, C
Hear this chord:▸ Guitar
Inversions:D7sus/G, D7sus/A, D7sus/C

Construction

Using the scale degree formula, we first start with the D 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 1-4-5-♭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 lowest note of the chord (D), then move our first interval (P4), which brings us to our second note in the chord (G). 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:
D1D#♭2E2F♭3F#3G4G#♭5A5Bb#5B6C♭7P4M2m3

Similar Chords

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

Chord TypeChords
7th Suspended Four Flat 9thD7sus4b9
7th Suspended SecondG7sus2, D7sus2, C7sus2
Added 9thGadd9, Fadd9, Cadd9
Dominant 7thD7
Half-Diminished 7thAm7(b5)
Major 2ndG2, F2, C2
Major 6thFM6, CM6
Major 7th Flat FifthG#Maj7b5, D#Maj7b5
Major Added 11thGadd11, Dadd11
Minor 2ndGm2, Cm2
Minor 6thCm6
Minor 7thDm7, Am7
Minor Added 11thGmadd11, Dmadd11, Amadd11
Minor Added 9thGmadd9, Cmadd9
Minor Six-NineCm6/9
Six-NineF6/9, C6/9
Suspended FourthGsus, Dsus
Suspended SecondGsus2, Csus2

Associated Scales

This chord can be found in the following scales.

ScaleRoots
BluesA, D
Blues MajorC, G
Blues MinorA, E
DorianC, A, G, D
Dorian b5A
Harmonic MajorG
Harmonic MinorG
Ionian #5Bb
LocrianB, A, F#, E
Locrian bb7F#
Locrian ♮6A
LydianC, Bb, F, D#
Lydian #9D#
Lydian Augmented #2D#
Lydian b3C
MajorC, Bb, G, F
Major PentatonicC, F
MinorA, G, E, D
Minor PentatonicA, D
MixolydianC, G, F, D
Mixolydian b2D
PhrygianB, A, E, D
Phrygian DominantD
Phrygian b4B
Super-Locrian bb7F#
SuspendedG, D
Ukrainian DorianC

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