C Augmented Chord
Mysterious, dreamy sound
Caug is playable as an open chord near the nut (Caug), making it one of the more beginner-friendly shapes.
Caug - Caug
What is a Caug chord?
An augmented chord stacks the root, major 3rd and raised 5th (#5). Like the diminished chord, both interval gaps are equal — but in this case, two major 3rds. The result is symmetrical and rootless-feeling: any of the three notes could plausibly be the root. Augmented chords feel suspended, dreamy, lifting — never fully resolved.
Notes in the chord: C – E – G#
Intervals: Root, 3, #5 (measured from the root)
Where Caug fits in a key
Caug appears as the I in C major.
Common progressions with Caug
I-V-vi-IV — in C major
C → G → Am → F
I-IV-V — in C major
C → F → G
I-vi-IV-V — in C major
C → Am → F → G
When to use a augmented chord
Caug works as a chromatic lift out of C on the way to F. Use augmented chords as a chromatic step inside a I → I+ → IV motion (e.g. C → Caug → F) — the raised 5th becomes the major 3rd of F, creating smooth voice leading. They appear constantly in jazz, blues turnarounds (the V+ before a I), and any genre wanting that suspended, lifting quality (think Beatles 'Oh Darling' intro, or 60s Bond themes).
Common substitutions for Caug
- •Augmented 7 (7#5) — adds a flat 7 for a dominant-augmented sound that resolves like V7
- •Whole-tone-derived voicings — augmented + 9 is rooted in the whole-tone scale
- •Plain major — drop the #5 if the moment calls for stability
Improvisation Basics
Learn to solo over progressions
Practice with Improvisio
Use Caug in a progression and see which scales work best.
Try it in the trainer