# F Augmented 7th piano chord (Faug7)

Faug7 contains F, A, C♯ and E♭. An augmented triad with the minor seventh added on top. C♯ and E♭ are black keys; F and A are white.

- Canonical page: https://piano.org/chords/augmented-7th/f/
- Entity: chord:augmented-7th:f
- Notes: F A C♯ E♭
- Formula: 1 3 ♯5 ♭7
- Intervals from root: P1, M3, m6, m7
- Interval stack (semitones): 4 4 2
- Also written: Faug7, Faug7, F augmented 7th
- Parameters: A440, 12-TET, 165 mm octave, spans centre to centre

## Construction

| Degree | Note | Interval from root | Semitones |
| --- | --- | --- | --- |
| 1 | F | Perfect unison | 0 |
| 3 | A | Major third | 4 |
| ♯5 | C♯ | Minor sixth | 8 |
| ♭7 | E♭ | Minor seventh | 10 |

## Fingering

Rest your right hand over the notes with finger 1 on F, finger 2 on A, finger 3 on C♯, finger 5 on E♭. The left hand mirrors it.
Right hand 1-2-3-5, left hand 5-3-2-1. Source: piano.org fingering method v1.

## Inversions

| Position | Bass | Notes in order | Figured bass | Span |
| --- | --- | --- | --- | --- |
| Root position | F | F3 A3 C♯4 E♭4 | 7 | 10 st, 138 mm |
| First inversion (Faug7/A) | A | A3 C♯4 E♭4 F4 | 6/5 | 8 st, 110 mm |
| Second inversion (Faug7/C♯) | C♯ | C♯4 E♭4 F4 A4 | 4/3 | 8 st, 110 mm |
| Third inversion (Faug7/E♭) | E♭ | E♭4 F4 A4 C♯5 | 4/2 | 10 st, 138 mm |

## Voicings (10)

| Voicing | Notes | Span | Relation | Omits or adds |
| --- | --- | --- | --- | --- |
| Close, root position | F3 A3 C♯4 E♭4 | 10 st, 138 mm | identical | none |
| Close, first inversion | A3 C♯4 E♭4 F4 | 8 st, 110 mm | identical | none |
| Close, second inversion | C♯4 E♭4 F4 A4 | 8 st, 110 mm | identical | none |
| Close, third inversion | E♭4 F4 A4 C♯5 | 10 st, 138 mm | identical | none |
| Drop 2 | C♯3 F3 A3 E♭4 | 14 st, 193 mm | identical | none |
| Drop 3 | A2 F3 C♯4 E♭4 | 18 st, 248 mm | identical | none |
| Drop 2 and 4 | F2 C♯3 A3 E♭4 | 22 st, 303 mm | identical | none |
| Shell, root ♭7 3 | F2 E♭3 A3 | 16 st, 220 mm | subset | omits C♯ |
| Guide tones, 3 and ♭7 | A3 E♭4 | 6 st, 83 mm | subset | omits F and C♯ |
| Rootless close | A3 C♯4 E♭4 | 6 st, 83 mm | subset | omits F |

## One-edit neighbors

| Becomes | Edit | Changes | Common tones |
| --- | --- | --- | --- |
| Faug | 1 3 ♯5 | drops E♭ | 3 |
| F7 | 1 3 5 ♭7 | C♯ becomes C | 3 |
| F9 | 1 3 5 ♭7 9 | C♯ becomes C, G | 3 |
| F | 1 3 5 | C♯, E♭ becomes C | 2 |
| Fmaj7 | 1 3 5 7 | C♯, E♭ becomes C, E | 2 |
| Fm7 | 1 ♭3 5 ♭7 | A, C♯ becomes A♭, C | 2 |
| Fm7♭5 | 1 ♭3 ♭5 ♭7 | A, C♯ becomes A♭, C♭ | 2 |
| F7sus4 | 1 4 5 ♭7 | A, C♯ becomes B♭, C | 2 |
| F6 | 1 3 5 6 | C♯, E♭ becomes C, D | 2 |
| Fadd9 | 1 3 5 9 | C♯, E♭ becomes C, G | 2 |

## Set theory

- Absolute pitch classes: {5, 9, 1, 3}
- Relative pitch classes: [0, 4, 8, 10]
- Normal order: [1, 3, 5, 9]
- Prime form: (0248)
- Forte number: 4-24
- Interval vector: <020301>

## Frequencies (close root position)

| Note | MIDI | Frequency |
| --- | --- | --- |
| F3 | 53 | 174.61 Hz |
| A3 | 57 | 220.00 Hz |
| C♯4 | 61 | 277.18 Hz |
| E♭4 | 63 | 311.13 Hz |

## Questions and answers

### What notes are in Faug7?

Faug7 contains F, A, C♯ and E♭. The formula is 1, 3, ♯5, ♭7.

### How do you play Faug7 on piano?

Play F, A, C♯ and E♭ together. Right hand fingers 1, 2, 3, 5; left hand 5, 3, 2, 1. C♯ and E♭ are black keys; F and A are white.

### What are the inversions of Faug7?

4 positions: root position F A C♯ E♭, Faug7/A, Faug7/C♯, Faug7/E♭.

### What is the difference between Faug7 and Faug?

Drops E♭. 3 of the notes are shared.

### What is an easy Faug7 for small hands?

The guide tones, 3 and ♭7 voicing, A3 E♭4, spans 6 semitones or about 83 mm.

### What are the frequencies of Faug7?

From F3 at A440 in 12-TET: 174.61, 220.00, 277.18, 311.13 Hz.

### What is the set class of Faug7?

Prime form (0248), Forte 4-24, interval vector &lt;020301&gt;.

### How do I transpose Faug7 to another key?

Keep the 1, 3, ♯5, ♭7 formula on the new root. Caug7 is C, E, G♯, B♭; D♭aug7 is D♭, F, A, C♭.

## 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-7th:f
Last reviewed: 2026-08-12