Scale degrees · E major
The ♭13 of E is C
The ♭13 (flat thirteen, written b13) of E is C: a minor thirteenth above the root.
E — the root, 1C — the ♭13
How to find it
A 13th is a 6th an octave up, so it takes the 6th's letter: E, F, G, A, B, C.
Then the sound: a minor thirteenth is 20 semitones above E, which is exactly where C is — no sharp or flat needed.
Where you meet it
The ♭13 is an altered tension of the dominant chord, one of the notes of the altered scale.
In E7♭13:
E · G♯ · B · D · C
The ♭13 in every key
| Key | The ♭13 |
|---|---|
| C | A♭ |
| G | E♭ |
| D | B♭ |
| A | F |
| E | C |
| B | G |
| F♯ | D |
| D♭ | B𝄫 |
| A♭ | F♭ |
| E♭ | C♭ |
| B♭ | G♭ |
| F | D♭ |
Every degree of E
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