D Suspended 2nd Chord

Chord Tones: D Suspended 2nd Chord

Symbol: sus2 — Formula: 1-2-5

DegreeNoteFrequency (A=440, Equal)
1 D 293.665 Hz
2 E 329.628 Hz
5 A 440.000 Hz

Chord Notation

Notation TypeSymbol / Value
Lead Sheet SymbolDsus2
All Common Symbolssus2
Interval Formula1-2-5
Harmonic Categoryopen

Roman numeral (e.g. I, IV, V) and Nashville Number notation are key-dependent. See Keys pages for chord function within specific keys.

Inversions

InversionNotes (low to high)Bass NoteSlash Notation
Root Position D E A D D Suspended 2nd Chord
First Inversion E A D E D Suspended 2nd Chord/E
Second Inversion A D E A D Suspended 2nd Chord/A

Harmonic Function

The D sus2 chord commonly functions as the supertonic (ii) in C major or dominant (V) in G major. Its harmonic role varies by key — in major keys it provides stable harmonic grounding.

The sus2 chord replaces the third with a major second, creating an open, ambiguous sound with no major or minor quality. It is widely used in rock and pop for its airy, unresolved character.

Common Progressions

The D Suspended 2nd Chord frequently appears in these progression patterns (shown in Roman numeral notation relative to key):

Songs Featuring the Suspended 2nd Chord

Well-known songs where the D Suspended 2nd Chord — or this chord type — plays a prominent role:

Tuning Frequencies Across Temperaments

Frequencies shown at A=440 Hz. View full temperament data for any note.

NoteEqual Temp.PythagoreanJust Intonation
D 293.665 Hz 293.332 Hz 294.329 Hz
E 329.628 Hz 330.001 Hz 327.032 Hz
A 440.000 Hz 440.000 Hz 436.043 Hz

Scales Containing the D Suspended 2nd Chord

These scales include the D Suspended 2nd Chord as a diatonic or characteristic chord: