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C7♯5

Character: restless

  1. CRtriad
  2. E3triad
  3. G♯♯5triad
  4. B♭♭7add
Open C7♯5 in the chord libraryDownload the C7♯5 chart (PDF)
Voicings

6 ways to play C7♯5

Every voicing sits inside one of the five CAGED shapes, low to high on the neck, with its octave doublings in grey.

  • Triad note
  • Substitute
  • Added
  • Anchored root
  • Bass
  • Doubling
CC shape 3rd inversion C7♯5/B♭
1 2 3 4 R ♯5 3 ♭7

Frets x 1 2 1 1 xNotes B♭ E G♯ CIntervals ♭7 3 ♯5 1Base triadC augmented, 1st inversion

The ♭7th gets a string of its own.

CC shape 2nd inversion C7♯5/G♯
1 2 3 4 5 ♭7 3 R ♯5 3 3

Frets 4 3 2 3 5 0Notes G♯ C E B♭Intervals ♯5 1 3 ♭7Base triadC augmented, 2nd inversion

The ♭7th gets a string of its own.

AA shape 2nd inversion C7♯5/G♯
3 4 5 6 ♭7 3 R ♯5

Frets x x 6 5 5 6Notes G♯ C E B♭Intervals ♯5 1 3 ♭7Base triadC augmented, 2nd inversion

The ♭7th gets a string of its own.

GG shape 3rd inversion C7♯5/B♭
5 6 7 8 R ♯5 3 ♭7

Frets 6 7 6 5 x xNotes B♭ E G♯ CIntervals ♭7 3 ♯5 1Base triadC augmented, 1st inversion

The ♭7th gets a string of its own.

EE shape 3rd inversion C7♯5/B♭
8 9 10 11 R ♯5 3 ♭7

Frets x x 8 9 9 8Notes B♭ E G♯ CIntervals ♭7 3 ♯5 1Base triadC augmented, 1st inversion

The ♭7th gets a string of its own.

EE shape 2nd inversion C7♯5/G♯
8 9 10 11 ♭7 3 R ♯5 3 R

Frets 8 11 10 9 11 0Notes G♯ C E B♭Intervals ♯5 1 3 ♭7Base triadC augmented, 2nd inversion

The ♭7th gets a string of its own.

The rules

The construction rules C7♯5 follows

  1. Start from a triad

    Root, 3rd and 5th, stacked in thirds. The 3rd makes it major or minor; the 5th makes it diminished or augmented when it moves.

  2. A third on top makes a 7th chord

    A major 7th over a major triad is maj7, a ♭7 is a dominant 7. Over minor you get m7 or m(maj7); over diminished, m7♭5 or the °7, whose 7th is lowered twice.

  3. Alter a dominant for tension

    Raise or lower the 5th or the 9th, or add a ♯11 or ♭13, and a dominant 7th pulls harder towards the next chord: G7♯9, G7♭9, G7♭13.

All the rules, with examples, in the guide to the chord library.

Dominant 7th ♯5 in every key

More chords on C

C7♯5 chord questions

What notes are in C7♯5?

C7♯5 is spelled C E G♯ B♭: C is the root, E is the 3rd, G♯ is the ♯5th, B♭ is the ♭7th.

What is the formula of C7♯5?

1 3 ♯5 ♭7. It is a C augmented triad with the ♭7th stacked on top.

How many ways can you play C7♯5 on guitar?

This page shows 6 voicings of C7♯5, filed under the five CAGED shapes and named by inversion, from the open position up to the 16th fret.