D Augmented Triad

Chord Tones: D Augmented Triad

Symbol: aug, + — Formula: 1-3-♯5

Chord Notation

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

Inversions

Harmonic Function

The D augmented 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 augmented triad consists of two stacked major thirds, creating a symmetrical, ambiguous chord. Its raised fifth gives it a tense, unresolved quality that pulls toward resolution. The D Augmented Triad specifically contains 3 notes: D, F♯, A♯ (formula: 1-3-♯5). On guitar, D-rooted chords use the open D string as their bass note, and the compact open-D shape is one of the most recognizable chord voicings. Rock anthems and folk songs frequently center on D chords, which provide a bright, cutting tone that projects well in ensemble settings.

Common Progressions

The D Augmented Triad frequently appears in these progression patterns (shown in Roman numeral notation relative to key):

• Iaug-IV
• Vaug-I

Songs Featuring the Augmented Triad

Well-known songs where the D Augmented Triad — or this chord type — plays a prominent role:

• Oh! You Pretty Things – David Bowie
• All Blues – Miles Davis
• Michelle – The Beatles

Tuning Frequencies Across Temperaments

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

Scales Containing the D Augmented Triad

These scales include the D Augmented Triad as a diatonic or characteristic chord: