Notes in Caug
The Caug chord contains 3 notes: C, E, A♭
Intervals
| Interval | Semitones | Note | Function |
|---|---|---|---|
| R | 0 | C | Root |
| 3 | 4 | E | Major 3rd |
| ♯5 | 8 | A♭ | Augmented 5th |
About C Augmented Chords
Augmented chords raise the 5th by a half step, creating an unsettled, dreamy tension. Like diminished 7th chords, augmented chords are symmetrical — they divide the octave into three equal parts. The Beatles used augmented chords frequently for their otherworldly quality.
Compatible Scales & Modes
These scales contain all the notes of Caug and can be used for soloing, improvising, and writing melodies over this chord.
Playing C augmented on Guitar
The C augmented chord, spelled C, E, A♭, occupies a specific harmonic role that depends on the musical context. In the key of C major, the most fundamental key in Western music, this chord can function as a primary harmony or as a passing color depending on where it appears in the progression. Understanding which scale degrees produce C-rooted chords helps you predict chord progressions and improvise melodies that complement the harmony.
On guitar, C augmented voicings benefit from open position voicings that resonate beautifully on acoustic guitar. The physical shape of this chord on the fretboard determines its tonal character — the same notes arranged in different voicings produce noticeably different sounds due to string gauge, fret position, and overtone content. Experiment with playing C augmented in multiple positions to find the voicing that best fits the register and texture of the music you are working on.
The augmented fifth in Caug creates an unsettled, dreamlike quality. Because augmented chords are symmetrical — dividing the octave into three equal parts — Caug shares its notes with two other augmented chords, giving you multiple harmonic interpretation options.
When practicing C augmented, use the compatible scales listed above to improvise melodies and riffs. Start by playing the chord, then explore the scale tones one at a time to hear how each note sounds against the harmony. This ear training exercise connects your theoretical knowledge of C-rooted chords to practical musicianship skills that improve your playing across all genres and styles.