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C augmented seventh chord

The C7♯5 chord (augmented seventh) is made of the notes C, E, G♯, B♭. Its formula compared with the major scale is 1 3 ♯5 ♭7.

C7♯5

Sevenths · 4 notes

Note names

How it is built

DegreeNoteInterval from the root
1CUnison
3EMajor third
♯5G♯Augmented fifth
♭7B♭Minor seventh

Inversions

  • C7♯5C E G♯ B♭Root position
  • C7♯5/EE G♯ B♭ CFirst inversion
  • C7♯5/G♯G♯ B♭ C ESecond inversion
  • C7♯5/B♭B♭ C E G♯Third inversion

Frequently asked questions

Which notes make up the C7♯5 chord?
The notes are C, E, G♯, B♭.
What is the formula of the C7♯5 chord?
The formula is 1 3 ♯5 ♭7: major third, augmented fifth, minor seventh.

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