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Note identifier · Reference entry

What chord is C–E–A♭?

The notes C, E, and A♭ spell C Augmented (Caug) — C the root, E the 3rd, and G♯ the ♯5.

Ranked readings

Every chord these notes can spell, most complete first. The bass note anchors the root-position reading; each candidate maps every note to its scale degree.

C AugmentedCaugConfident

Every tone of Caug is present, with C in the bass — the definitive reading.

DegreeNoteIn this set
1Csounding
3Esounding
♯5G♯sounding
E AugmentedEaugConfident

All tones of Eaug are present; the B♯ note is lowest (2nd inversion).

DegreeNoteIn this set
1Esounding
3G♯sounding
♯5B♯sounding
A♭ AugmentedA♭augConfident

All tones of A♭aug are present; the C note is lowest (1st inversion).

DegreeNoteIn this set
1A♭sounding
3Csounding
♯5Esounding

Not these chords

Names these notes are often mistaken for. Each is ruled out because a defining tone of that chord is missing — the note that would make the name true simply is not being played.

Not A♭aug7

Not A♭aug7: a augmented 7th A♭ chord needs G♭ as its ♭7 — G♭ is absent.

Not Caug7

Not Caug7: a augmented 7th C chord needs B♭ as its ♭7 — B♭ is absent.

Not Eaug7

Not Eaug7: a augmented 7th E chord needs D as its ♭7 — D is absent.

Not A♭7♯5

Not A♭7♯5: a dominant 7th ♯5 A♭ chord needs G♭ as its ♭7 — G♭ is absent.

Not C7♯5

Not C7♯5: a dominant 7th ♯5 C chord needs B♭ as its ♭7 — B♭ is absent.

How these notes relate

The same notes over E in the bass spell Eaug.

Add G♭ (its ♭7) and the set reads as A♭aug7.

Set-class analysis

The pitch-class set theory identity of these notes — order- and key-independent, computed from the set itself.

Pitch-class set
{0, 4, 8}
Normal order
[0,4,8]
Prime form
[0,4,8]
Interval vector
<000300>
Forte set class
3-12

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