# F♯ Augmented 7th piano chord (F♯aug7)

F♯aug7 contains F♯, A♯, C× and E. An augmented triad with the minor seventh added on top. F♯ and A♯ are black keys; C× and E are white.

- Canonical page: https://piano.org/chords/augmented-7th/f-sharp/
- Entity: chord:augmented-7th:f-sharp
- 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: F♯aug7, F#aug7, 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 2 on F♯, finger 3 on A♯, finger 4 on C×, finger 5 on E. The left hand mirrors it.
Right hand 2-3-4-5, left hand 5-4-3-2. Source: piano.org fingering method v1.

## Inversions

| Position | Bass | Notes in order | Figured bass | Span |
| --- | --- | --- | --- | --- |
| Root position | F♯ | F♯3 A♯3 C×4 E4 | 7 | 10 st, 138 mm |
| First inversion (F♯aug7/A♯) | A♯ | A♯3 C×4 E4 F♯4 | 6/5 | 8 st, 110 mm |
| Second inversion (F♯aug7/C×) | C× | C×4 E4 F♯4 A♯4 | 4/3 | 8 st, 110 mm |
| Third inversion (F♯aug7/E) | E | E4 F♯4 A♯4 C×5 | 4/2 | 10 st, 138 mm |

## Voicings (10)

| Voicing | Notes | Span | Relation | Omits or adds |
| --- | --- | --- | --- | --- |
| Close, root position | F♯3 A♯3 C×4 E4 | 10 st, 138 mm | identical | none |
| Close, first inversion | A♯3 C×4 E4 F♯4 | 8 st, 110 mm | identical | none |
| Close, second inversion | C×4 E4 F♯4 A♯4 | 8 st, 110 mm | identical | none |
| Close, third inversion | E4 F♯4 A♯4 C×5 | 10 st, 138 mm | identical | none |
| Drop 2 | C×3 F♯3 A♯3 E4 | 14 st, 193 mm | identical | none |
| Drop 3 | A♯2 F♯3 C×4 E4 | 18 st, 248 mm | identical | none |
| Drop 2 and 4 | F♯2 C×3 A♯3 E4 | 22 st, 303 mm | identical | none |
| Shell, root ♭7 3 | F♯2 E3 A♯3 | 16 st, 220 mm | subset | omits C× |
| Guide tones, 3 and ♭7 | A♯3 E4 | 6 st, 83 mm | subset | omits F♯ and C× |
| Rootless close | A♯3 C×4 E4 | 6 st, 83 mm | subset | omits F♯ |

## One-edit neighbors

| Becomes | Edit | Changes | Common tones |
| --- | --- | --- | --- |
| F♯aug | 1 3 ♯5 | drops E | 3 |
| F♯7 | 1 3 5 ♭7 | C× becomes C♯ | 3 |
| F♯9 | 1 3 5 ♭7 9 | C× becomes C♯, G♯ | 3 |
| F♯ | 1 3 5 | C×, E becomes C♯ | 2 |
| F♯maj7 | 1 3 5 7 | C×, E becomes C♯, E♯ | 2 |
| F♯m7 | 1 ♭3 5 ♭7 | A♯, C× becomes A, C♯ | 2 |
| F♯m7♭5 | 1 ♭3 ♭5 ♭7 | A♯, C× becomes A, C | 2 |
| F♯7sus4 | 1 4 5 ♭7 | A♯, C× becomes B, C♯ | 2 |
| F♯6 | 1 3 5 6 | C×, E becomes C♯, D♯ | 2 |
| F♯add9 | 1 3 5 9 | C×, E becomes C♯, G♯ | 2 |

## Set theory

- Absolute pitch classes: {6, 10, 2, 4}
- Relative pitch classes: [0, 4, 8, 10]
- Normal order: [2, 4, 6, 10]
- Prime form: (0248)
- Forte number: 4-24
- Interval vector: <020301>

## Frequencies (close root position)

| Note | MIDI | Frequency |
| --- | --- | --- |
| F♯3 | 54 | 185.00 Hz |
| A♯3 | 58 | 233.08 Hz |
| C×4 | 62 | 293.66 Hz |
| E4 | 64 | 329.63 Hz |

## Questions and answers

### What notes are in F♯aug7?

F♯aug7 contains F♯, A♯, C× and E. The formula is 1, 3, ♯5, ♭7.

### How do you play F♯aug7 on piano?

Play F♯, A♯, C× and E together. Right hand fingers 2, 3, 4, 5; left hand 5, 4, 3, 2. F♯ and A♯ are black keys; C× and E are white.

### What are the inversions of F♯aug7?

4 positions: root position F♯ A♯ C× E, F♯aug7/A♯, F♯aug7/C×, F♯aug7/E.

### What is the difference between F♯aug7 and F♯aug?

Drops E. 3 of the notes are shared.

### What is an easy F♯aug7 for small hands?

The guide tones, 3 and ♭7 voicing, A♯3 E4, spans 6 semitones or about 83 mm.

### What are the frequencies of F♯aug7?

From F♯3 at A440 in 12-TET: 185.00, 233.08, 293.66, 329.63 Hz.

### What is the set class of F♯aug7?

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

### How do I transpose F♯aug7 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♭.

### Is G♭aug7 the same as F♯aug7?

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