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C♯ augmented major 7th chord on ukulele (C♯augMaj7)
Also called or written C♯augMaj7, C♯augM7, C♯+M7, C♯M7#5, C♯maj+7, C♯ augmented major seventh or C♯ major seventh sharp five
C♯ augmented major 7th contains C♯, E♯, G♯♯, and B♯. The default voicing spans frets 1–3 and requires a stretch between the index and pinky.
How it is built
Formula 1, 3, ♯5, 7
How do you play a C♯ augmented major 7th chord on ukulele?
C♯ augmented major 7th is played at the 1st fret as 2 1 1 3: ring finger on the G string at fret 2, index finger on the C string at fret 1, middle finger on the E string at fret 1 and pinky finger on the A string at fret 3.
Full note and interval breakdown
| String | Fret | Finger | Note |
|---|---|---|---|
| 4 (G) | 2 | 3 | G♯♯ (♯5) |
| 3 (C) | 1 | 1 | C♯ (1) |
| 2 (E) | 1 | 2 | E♯ (3) |
| 1 (A) | 3 | 4 | B♯ (7) |
AdvancedThe pinky must reach fret 3 on the 1st string while the index and middle fingers hold fret 1, requiring a wide stretch.
C♯augM7/E♯ inversion
C♯ augmented major 7th is played at the 4th fret as 5 5 5 4: middle finger on the G string at fret 5, ring finger on the C string at fret 5, pinky finger on the E string at fret 5 and index finger on the A string at fret 4.
Full note and interval breakdown
| String | Fret | Finger | Note |
|---|---|---|---|
| 4 (G) | 5 | 2 | B♯ (7) |
| 3 (C) | 5 | 3 | E♯ (3) |
| 2 (E) | 5 | 4 | G♯♯ (♯5) |
| 1 (A) | 4 | 1 | C♯ (1) |
Why it sounds like that
C♯ augmented major 7th is built from 1, 3, ♯5, and 7. The augmented 5th G♯♯ gives the chord its bright, tense quality. Compared to C♯ major 7th, only the fifth is raised a semitone.
What goes wrong with C♯ augmented major 7th?
- The pinky collapses and mutes the 1st string instead of fretting fret 3 cleanly.
- The index finger leans on the 4th string, causing fret 2 to buzz.
When to use it
Use the supplied linked chords to hear its tension without adding unsupported harmony. C♯ augmented major 7th suits jazz and cinematic textures where the raised fifth adds tension. Try C♯ augmented major 7th before C♯ major or C♯ major 7th.
Changing to and from C♯ augmented major 7th
- Slide the shape up one fret to the 2nd fret to reach D augmented major 7th.
Which voicing to use
The C♯augM7/A inversion places G♯♯ in the bass for a darker, unstable sound. The C♯augM7/C inversion, with B♯ in the bass, is brighter and more resolved.
Other C♯ chords
Common questions
How is C♯ augmented major 7th written?
C♯ augmented major 7th is written C♯+M7, M7#5, maj+7, or C♯augM7. The ASCII root spelling is C#. It is also spelled D♭ in enharmonic notation for the same sounding root.
What is the difference between C♯ augmented major 7th and C♯ major 7th?
C♯ augmented major 7th has a raised fifth, G♯♯, while C♯ major 7th has G♯. The raised fifth creates a more dissonant, tense sound.
Why does C♯ augmented major 7th have no tritone?
C♯ augmented major 7th contains no tritone because the interval between E♯ and B♯ is a perfect fifth, not a diminished fifth.