Faug arpeggio

F Augmented — the notes F, A, C# 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
F Augmented
Root
F
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

1Froot
3Amajor 3rd
#5C#aug 5th
Construction formula
F4 stA4 stC#

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

Base chord
Distinction from similar

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

Function and tensions

Resolution
Faugsource
Fresolves to
Augmented Faug 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.

Dmharmonic minor
Faugdegree III
The raised 7th of harmonic minor makes the III triad augmented — Faug arises within the key on its own.
FaugV+
Bbresolution
As a dominant it resolves a fourth up: the raised fifth (C#) rises a semitone into the tonic's third (D).
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 Faug 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#mDbBbmAbFmEbCmBbGmFDmFmajor
Relative key
Dominant
Subdominant
Key signature
1 flat (Bb)

Practice

Keyboard Trainer

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

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