# G♯ Suspended 4th piano chord (G♯sus4)

G♯sus4 contains G♯, C♯ and D♯. The third replaced by the fourth. Every note is a black key.

- Canonical page: https://piano.org/chords/suspended-4th/g-sharp/
- Entity: chord:sus4:g-sharp
- Notes: G♯ C♯ D♯
- Formula: 1 4 5
- Intervals from root: P1, P4, P5
- Interval stack (semitones): 5 2
- Also written: G♯sus4, G#sus4, G♯ suspended 4th
- Parameters: A440, 12-TET, 165 mm octave, spans centre to centre

## Construction

| Degree | Note | Interval from root | Semitones |
| --- | --- | --- | --- |
| 1 | G♯ | Perfect unison | 0 |
| 4 | C♯ | Perfect fourth | 5 |
| 5 | D♯ | Perfect fifth | 7 |

## Fingering

Rest your right hand over the notes with finger 1 on G♯, finger 3 on C♯, finger 5 on D♯. 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 | G♯ | G♯3 C♯4 D♯4 | 5/3 | 7 st, 96 mm |
| First inversion (G♯sus4/C♯) | C♯ | C♯4 D♯4 G♯4 | 6/3 | 7 st, 96 mm |
| Second inversion (G♯sus4/D♯) | D♯ | D♯4 G♯4 C♯5 | 6/4 | 10 st, 138 mm |

## Voicings (5)

| Voicing | Notes | Span | Relation | Omits or adds |
| --- | --- | --- | --- | --- |
| Close, root position | G♯3 C♯4 D♯4 | 7 st, 96 mm | identical | none |
| Close, first inversion | C♯4 D♯4 G♯4 | 7 st, 96 mm | identical | none |
| Close, second inversion | D♯4 G♯4 C♯5 | 10 st, 138 mm | identical | none |
| Open, fifth on top | G♯2 D♯3 C♯4 | 17 st, 234 mm | identical | none |
| Root and third only | G♯3 C♯4 | 5 st, 69 mm | subset | omits D♯ |

## One-edit neighbors

| Becomes | Edit | Changes | Common tones |
| --- | --- | --- | --- |
| G♯7sus4 | 1 4 5 ♭7 | adds F♯ | 3 |
| G♯ | 1 3 5 | C♯ becomes B♯ | 2 |
| G♯m | 1 ♭3 5 | C♯ becomes B | 2 |
| G♯sus2 | 1 2 5 | C♯ becomes A♯ | 2 |
| G♯maj7 | 1 3 5 7 | C♯ becomes B♯, F× | 2 |
| G♯7 | 1 3 5 ♭7 | C♯ becomes B♯, F♯ | 2 |
| G♯m7 | 1 ♭3 5 ♭7 | C♯ becomes B, F♯ | 2 |
| G♯mMaj7 | 1 ♭3 5 7 | C♯ becomes B, F× | 2 |
| G♯6 | 1 3 5 6 | C♯ becomes B♯, E♯ | 2 |
| G♯m6 | 1 ♭3 5 6 | C♯ becomes B, E♯ | 2 |
| G♯add9 | 1 3 5 9 | C♯ becomes B♯, A♯ | 2 |
| G♯dim | 1 ♭3 ♭5 | C♯, D♯ becomes B, D | 1 |

## Set theory

- Absolute pitch classes: {8, 1, 3}
- Relative pitch classes: [0, 5, 7]
- Normal order: [1, 3, 8]
- Prime form: (027)
- Forte number: 3-9
- Interval vector: <010020>

## Frequencies (close root position)

| Note | MIDI | Frequency |
| --- | --- | --- |
| G♯3 | 56 | 207.65 Hz |
| C♯4 | 61 | 277.18 Hz |
| D♯4 | 63 | 311.13 Hz |

## Questions and answers

### What notes are in G♯sus4?

G♯sus4 contains G♯, C♯ and D♯. The formula is 1, 4, 5.

### How do you play G♯sus4 on piano?

Play G♯, C♯ and D♯ together. Right hand fingers 1, 3, 5; left hand 5, 3, 1. Every note is a black key.

### What are the inversions of G♯sus4?

3 positions: root position G♯ C♯ D♯, G♯sus4/C♯, G♯sus4/D♯.

### What is the difference between G♯sus4 and G♯7sus4?

Adds F♯. 3 of the notes are shared.

### What is an easy G♯sus4 for small hands?

The root and third only voicing, G♯3 C♯4, spans 5 semitones or about 69 mm.

### What are the frequencies of G♯sus4?

From G♯3 at A440 in 12-TET: 207.65, 277.18, 311.13 Hz.

### What is the set class of G♯sus4?

Prime form (027), Forte 3-9, interval vector &lt;010020&gt;.

### How do I transpose G♯sus4 to another key?

Keep the 1, 4, 5 formula on the new root. Csus4 is C, F, G; C♯sus4 is C♯, F♯, G♯.

### Is A♭sus4 the same as G♯sus4?

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:sus4:g-sharp
Last reviewed: 2026-08-12