Gbsus4

Q: What notes are in the Gbsus4 chord?

The Gbsus4 chord (Gb Sus4) contains: Gb, Cb, Db. Its interval structure is shown above in the Theory section.

Q: How do I build Gbsus4 on the keyboard?

Take the root and add the remaining chord tones following the interval formula. The highlight shows chord content, while the inversion control changes which chord tone is in the bass.

Q: Which keys is Gbsus4 found in?

The chord acts as a diatonic degree in several keys — they are marked on the circle of fifths in the "Harmonic context" block.

Q: What can I substitute for Gbsus4?

A substitution depends on harmonic function and voice leading, not only on shared tones. Computed options appear in the "Substitutions" block and should be checked in context.

Gb Sus4

Octaves

Musical context

ChordGbsus4Gb Sus4

ArpeggioGb majorBroken triad

ScaleGb major7 notes

KeyGb majorMajor key

ProgressionPop axisSequence

How the chord relates to the scale, mode, key and progression.

Theory

General info

Full name: Gb Sus4
Symbol: Gbsus4
Root: Gb
Quality: Sus4

Chord notes

1Gbroot

4Cbperfect 4th

5Dbperfect 5th

Functions & resolutions

Typical function in key: IVSubdominant (IV)C# major
Stability / tension: Moderate tension — suspension awaits resolution
Most common resolutions: GbGb Major GbmGb Minor
Unstable degrees: 3Bb
4B
resolves down to the 3rd
Main resolution: Gbsus4source
GbGb Major
The suspended 4th in Gbsus4 pulls down to the 3rd, resolving to Gb major or minor.
Other resolutions: Gbsus4source
Deceptive resolution
GbmGb Minor
Gbsus4 can resolve to minor instead of major — the 4th drops to the minor 3rd.
Gbsus4source
No resolution needed
In modal music, a sus chord may remain an independent sonority without 4–3 or 2–3 motion; with no 3rd, it defines neither major nor minor quality.
Gbsus4source
Jazz reharmonization
Gb7sus4Gb 7sus4
In jazz, 7sus4 may retain its dominant bass and minor 7th without immediately resolving the 4th to the 3rd; it may also move to another sus chord.
Gbsus4source
Functional resolution
BB Major
A sus chord can move up a 4th or down a step, functioning as a suspension from degrees other than the tonic.

Features

Character: No 3rd, with 4th-degree tension
Characteristic interval: Fourth instead of 3rd (4)
Description: The 4th replaces the 3rd, so the chord defines neither major nor minor quality. In a typical sus4 resolution, the 4th descends to the 3rd.
Application: Pop and rock (sus4 → major)
Pause before resolution
Building tension

Voicing & structure

Root position

v1Gb(Gb4)Bass

root

v2Cb(Cb4)P4from Gb

v3Db(Db5)M2from Cb

Harmony

Compatible scales

All chord tones are contained in these scales — use them for improvisation.

ScaleC# Minor pentatonic ScaleC# Iwato (Japanese)ScaleF# Minor pentatonic ScaleF# In (Japanese)ScaleF# Yo (Japanese)ScaleB Major pentatonic ScaleB Yo (Japanese)ScaleB Akebono (Japanese)ScaleB Hirajoshi (Japanese)ScaleE Major pentatonic

This chord on guitar 🎸

See how Gbsus4 looks on guitar.

Explore

Circle of fifths

Highlighted major keys contain this chord among their diatonic harmonies.

Relative key: D#mD# minor
Dominant: DbDb major
Subdominant: BB major
Key signature: 6 sharps (F#, C#, G#, D#, A#, E#)

What to learn next

ScaleF# Ionian (major)Scale to improvise over this chord ChordGb MajorA nearby chord on the same root — compare the sound PracticeChord trainerLock the fingering into muscle memory ProgressionChord progressionsHow this chord works inside real progressions ChordGb Sus2Another related chord to practise

Recommended for you

Gb MajorA chord that sounds close

Gb Sus2A chord that sounds close

Gb 7sus4A chord that sounds close

F# Ionian (major)A scale related to this chord

F# DorianA scale related to this chord

Practice

Keyboard Trainer

Reinforce it in practice — play and name notes on the interactive keyboard.

Open Trainer

Test yourself

(Press any key to start)

What notes are in the Gbsus4 chord?

How do I build Gbsus4 on the keyboard?

Which keys is Gbsus4 found in?

What can I substitute for Gbsus4?