7♯5 chord - charango
The 7♯5 chord (or 7+5) is a dominant chord with an augmented fifth. This alteration creates additional tension that enriches harmonic resolution.
Intervals
| Degree | I | III | ♯V | ♭VII |
|---|---|---|---|---|
| Interval | Root | Major third | Augmented fifth | Minor seventh |
| Semitones | 0 | 4 | 8 | 10 |
Formula 1 - 3 - ♯5 - ♭7
Theory
The 7♯5 chord raises the fifth by a semitone. G7♯5 = G-B-D♯-F, C7♯5 = C-E-G♯-B♭. The augmented fifth adds chromatic tension to the tritone already present between the third and seventh. This chord creates a double resolution: the augmented fifth rises by a semitone and the tritone resolves.
Examples
Example: Do 7♯5
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