Eb Augmented Triad
Chord Tones: Eb Augmented Triad
Symbol: aug, + — Formula: 1-3-♯5
| Degree | Note | Frequency (A=440, Equal) |
|---|---|---|
| 1 | Eb | 311.127 Hz |
| 3 | G | 391.995 Hz |
| ♯5 | B | 493.883 Hz |
Chord Notation
| Notation Type | Symbol / Value |
|---|---|
| Lead Sheet Symbol | Ebaug |
| All Common Symbols | aug, + |
| Interval Formula | 1-3-♯5 |
| Harmonic Category | unstable |
Roman numeral (e.g. I, IV, V) and Nashville Number notation are key-dependent. See Keys pages for chord function within specific keys.
Inversions
| Inversion | Notes (low to high) | Bass Note | Slash Notation |
|---|---|---|---|
| Root Position | Eb – G – B | Eb | Eb Augmented Triad |
| First Inversion | G – B – Eb | G | Eb Augmented Triad/G |
| Second Inversion | B – Eb – G | B | Eb Augmented Triad/B |
Harmonic Function
The Eb augmented chord commonly functions as the mediant (♭III) in C minor or subdominant in B♭ 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.
Common Progressions
The Eb Augmented Triad frequently appears in these progression patterns (shown in Roman numeral notation relative to key):
I+-IVV+-I
Songs Featuring the Augmented Triad
Well-known songs where the Eb 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.
| Note | Equal Temp. | Pythagorean | Just Intonation |
|---|---|---|---|
| Eb | 311.127 Hz | 309.026 Hz | 313.951 Hz |
| G | 391.995 Hz | 391.111 Hz | 392.438 Hz |
| B | 493.883 Hz | 495.000 Hz | 490.548 Hz |
Scales Containing the Eb Augmented Triad
These scales include the Eb Augmented Triad as a diatonic or characteristic chord: