A flat augmented piano chord (Abaug)

Also written G#aug (G sharp augmented)

An augmented chord stacks two major thirds, with an augmented fifth. Strange and floating, it often works as a transition between two chords.

On the keyboard

Chord notes

NoteInterval
A♭ (A flat)root
Cmajor third
Eaugmented fifth

Formula: 1 – 3 – #5 · A♭ – C – E

A progression with this chord

  1. A♭I
  2. A♭augI+
  3. C♯IV

The augmented chord connects the major chord to the chord built on the fourth.

Other A♭ chords

The same chord on other roots