# D♭ Augmented piano chord (D♭aug)

D♭aug contains D♭, F and A. Two stacked major thirds. D♭ is a black key; F and A are white.

- Canonical page: https://piano.org/chords/augmented/d-flat/
- Entity: chord:augmented:d-flat
- Notes: D♭ F A
- Formula: 1 3 ♯5
- Intervals from root: P1, M3, m6
- Interval stack (semitones): 4 4
- Also written: D♭aug, Dbaug, D♭ augmented
- Parameters: A440, 12-TET, 165 mm octave, spans centre to centre

## Construction

| Degree | Note | Interval from root | Semitones |
| --- | --- | --- | --- |
| 1 | D♭ | Perfect unison | 0 |
| 3 | F | Major third | 4 |
| ♯5 | A | Minor sixth | 8 |

## Fingering

Rest your right hand over the notes with finger 1 on D♭, finger 3 on F, finger 5 on A. The left hand mirrors it.
Right hand 1-3-5, left hand 5-3-1. Source: piano.org fingering method v1.

## Inversions

| Position | Bass | Notes in order | Figured bass | Span |
| --- | --- | --- | --- | --- |
| Root position | D♭ | D♭3 F3 A3 | 5/3 | 8 st, 110 mm |
| First inversion (D♭aug/F) | F | F3 A3 D♭4 | 6/3 | 8 st, 110 mm |
| Second inversion (D♭aug/A) | A | A3 D♭4 F4 | 6/4 | 8 st, 110 mm |

## Voicings (5)

| Voicing | Notes | Span | Relation | Omits or adds |
| --- | --- | --- | --- | --- |
| Close, root position | D♭3 F3 A3 | 8 st, 110 mm | identical | none |
| Close, first inversion | F3 A3 D♭4 | 8 st, 110 mm | identical | none |
| Close, second inversion | A3 D♭4 F4 | 8 st, 110 mm | identical | none |
| Open, fifth on top | D♭2 A2 F3 | 16 st, 220 mm | identical | none |
| Root and third only | D♭3 F3 | 4 st, 55 mm | subset | omits A |

## One-edit neighbors

| Becomes | Edit | Changes | Common tones |
| --- | --- | --- | --- |
| D♭aug7 | 1 3 ♯5 ♭7 | adds C♭ | 3 |
| D♭ | 1 3 5 | A becomes A♭ | 2 |
| D♭maj7 | 1 3 5 7 | A becomes A♭, C | 2 |
| D♭7 | 1 3 5 ♭7 | A becomes A♭, C♭ | 2 |
| D♭6 | 1 3 5 6 | A becomes A♭, B♭ | 2 |
| D♭add9 | 1 3 5 9 | A becomes A♭, E♭ | 2 |
| D♭m | 1 ♭3 5 | F, A becomes F♭, A♭ | 1 |
| D♭dim | 1 ♭3 ♭5 | F, A becomes F♭, A♭♭ | 1 |
| D♭sus2 | 1 2 5 | F, A becomes E♭, A♭ | 1 |
| D♭sus4 | 1 4 5 | F, A becomes G♭, A♭ | 1 |

## Set theory

- Absolute pitch classes: {1, 5, 9}
- Relative pitch classes: [0, 4, 8]
- Normal order: [1, 5, 9]
- Prime form: (048)
- Forte number: 3-12
- Interval vector: <000300>

## Frequencies (close root position)

| Note | MIDI | Frequency |
| --- | --- | --- |
| D♭3 | 49 | 138.59 Hz |
| F3 | 53 | 174.61 Hz |
| A3 | 57 | 220.00 Hz |

## Questions and answers

### What notes are in D♭aug?

D♭aug contains D♭, F and A. The formula is 1, 3, ♯5.

### How do you play D♭aug on piano?

Play D♭, F and A together. Right hand fingers 1, 3, 5; left hand 5, 3, 1. D♭ is a black key; F and A are white.

### What are the inversions of D♭aug?

3 positions: root position D♭ F A, D♭aug/F, D♭aug/A.

### What is the difference between D♭aug and D♭aug7?

Adds C♭. 3 of the notes are shared.

### What is an easy D♭aug for small hands?

The root and third only voicing, D♭3 F3, spans 4 semitones or about 55 mm.

### What are the frequencies of D♭aug?

From D♭3 at A440 in 12-TET: 138.59, 174.61, 220.00 Hz.

### What is the set class of D♭aug?

Prime form (048), Forte 3-12, interval vector &lt;000300&gt;.

### How do I transpose D♭aug to another key?

Keep the 1, 3, ♯5 formula on the new root. Caug is C, E, G♯; Daug is D, F♯, A♯.

### Is C♯aug the same as D♭aug?

Enharmonically yes: the same piano keys and the same sound, spelled differently.

## Provenance

Every derived value above is computed by the piano.org theory kernel from the root, the quality and the stated parameters. Nothing is hand-entered per chord.

Machine record: https://piano.org/api/knowledge/v1/entities/chord:augmented:d-flat
Last reviewed: 2026-08-12