Gbaug arpeggio

Gb Augmented — the notes Gb, Bb, D played one at a time, bottom-up and back.

Octaves

Musical context

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

How to play the arpeggio

Left handRight hand

Theory

General info

Full name
Gb Augmented
Root
Gb
Quality
Augmented
Type
Augmented triad
Note count
3
Brief character
Unstable sound with a sense of unresolved motion. Symmetric structure of major thirds creates a "suspended" sound without clear pull.
Character & mood

Unstable, expanding, "suspended". Ambiguity, tense anticipation of resolution.

Recognition

Recognized by the characteristic "expanding" feel of the augmented fifth.

Notes & degrees

1Gbroot
3Bbmajor 3rd
#5Daug 5th
Construction formula
Gb4 stBb4 stD

Two consecutive major thirds: 1-3-#5.

On the piano

An arpeggio is a broken chord: the same notes played one after another rather than together, bottom-up and back. On the piano they are usually split between the two hands — in an accompaniment, for instance, the left hand carries the bass while the right fills in the figuration.

Any chord can be played arpeggiato or turned into figuration — a broken bass, Alberti figures, a waltz accompaniment. Unlike the guitar, where an arpeggio is tied to the order the strings are plucked, there is no fixed fingering “shape” here — evenness and legato between the notes matter most.

Chord basis

Distinction from similar

Differs from major by the raised fifth (#5 instead of 5).

Function and tensions

Resolution
Gbaugsource
Gbresolves to
Augmented Gbaug has a raised 5th. As a dominant it resolves up a 4th — the raised 5th rising a semitone. Returning to the major of the same root, it instead falls back to a perfect 5th.
Harmonic behavior

Chromatic dominant, transition between major and minor.

Stability note

Transitional — heard as incomplete motion.

Harmonic context

Chords and functions

Degree III of harmonic minor, or a raised fifth degree acting as a chromatic dominant.

Ebmharmonic minor
Gbaugdegree III
The raised 7th of harmonic minor makes the III triad augmented — Gbaug arises within the key on its own.
GbaugV+
Bresolution
As a dominant it resolves a fourth up: the raised fifth (D) rises a semitone into the tonic's third (Eb).
Best harmonies

Harmonic minor, melodic minor, whole-tone scale.

Solo support

Adds an unexpected "twist" to the melodic line.

Compatible scales & modes

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

This arpeggio on guitar 🎸

See how Gbaug looks on guitar.

Explore

Circle of fifths

Keys where this chord functions as a scale degree, on the circle of fifths.

CAmGEmDBmAF#mEC#mBG#mF#D#mDbBbmAbFmEbCmBbGmFDmF#major
Relative key
Dominant
Subdominant
Key signature
6 sharps (F#, C#, G#, D#, A#, E#)

Practice

Keyboard Trainer

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

Open Trainer