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

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

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

## Construction

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

## Fingering

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

## Voicings (5)

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

## One-edit neighbors

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

## Set theory

- Absolute pitch classes: {3, 8, 10}
- Relative pitch classes: [0, 5, 7]
- Normal order: [8, 10, 3]
- Prime form: (027)
- Forte number: 3-9
- Interval vector: <010020>

## Frequencies (close root position)

| Note | MIDI | Frequency |
| --- | --- | --- |
| D♯3 | 51 | 155.56 Hz |
| G♯3 | 56 | 207.65 Hz |
| A♯3 | 58 | 233.08 Hz |

## Questions and answers

### What notes are in D♯sus4?

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

### How do you play D♯sus4 on piano?

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

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

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

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

Adds C♯. 3 of the notes are shared.

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

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

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

From D♯3 at A440 in 12-TET: 155.56, 207.65, 233.08 Hz.

### What is the set class of D♯sus4?

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

### How do I transpose D♯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 E♭sus4 the same as D♯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:d-sharp
Last reviewed: 2026-08-12