Aeolian Mode Formula
The Aeolian mode can be formed by using the same notes as the major scale, but starting and ending on the 6th degree of the major scale. You can consider this 6th degree as the root note of the Aeolian mode.
In terms of its construction, the Aeolian mode follows the pattern of whole and half steps: whole, half, whole, whole, half, whole, whole.
This sequence of intervals results in a minor scale, and the starting note determines the specific Aeolian mode (e.g., A Aeolian, B Aeolian, etc.).
Its key characteristic is the minor third interval between the first and third degrees, making it a minor scale and contributing to a somber and reflective mood.
As shown in the chart below, the interval pattern is : 1 (tonic) - 2 (second) - b3 (minor third) - 4 (fourth) - 5 (fifth) - b6 (minor sixth) - b7 (minor seventh).
| A Aeolian mode |
A |
B |
C |
D |
E |
F |
G |
| Formula |
1 |
2 |
b3 |
4 |
5 |
b6 |
b7 |
| Intervals |
W |
H |
W |
W |
H |
W |
W |
(W = whole step ; H = half step)
b3 → makes it minor
b6 → gives it a darker / sadder color
b7 → removes strong resolution (no leading tone)