27 / 18210 · Module 2 — Major Scales, Scale Degrees, Key Signatures, and the Circle of Fifths← prev⊞ allnext →
2.4This is the Circle of Fifths
Start from C and move upward by perfect fifths:
C → G → D → A → E → B → F♯ → C♯
Each step adds one sharp.
Key signatures:
| Key | Sharps |
|---|---|
| C | none |
| G | F♯ |
| D | F♯ C♯ |
| A | F♯ C♯ G♯ |
| E | F♯ C♯ G♯ D♯ |
| B | F♯ C♯ G♯ D♯ A♯ |
| F♯ | F♯ C♯ G♯ D♯ A♯ E♯ |
The order of sharps is always:
F C G D A E B
or:
фа до соль ре ля ми си
That sequence itself follows fifths.