Ab dorian

Construction

Step pattern (W = whole step, H = half step): W-H-W-W-W-H-W.

Formula (intervals from the root): 1-2-b3-4-5-6-b7.

Dorian is a minor scale with a natural 6 instead of the b6 found in natural minor (1-2-b3-4-5-b6-b7). That one difference -- a major sixth in place of a minor sixth -- shifts the entire character from dark and brooding to warm and inviting.

Origin and Relationships

Dorian is a mode -- a scale derived by starting a parent scale from a different degree. It belongs to the diatonic modes family, derived as the 2nd mode of the major scale.

• Parent: the major scale starting from its 2nd degree. To find the parent, go down a whole step from the Dorian root.
• Compare to Aeolian: Dorian has a natural 6 where Aeolian has b6. This single note is the only difference between the two scales.
• The natural 6 also makes Dorian symmetric -- its step pattern reads the same forwards and backwards.

Harmonic Context

In Roman numeral analysis (uppercase = major, lowercase = minor):

• i7 (minor seventh): Tonic. The min7 chord captures Dorian's essence -- minor but not heavy. In jazz, Dorian is the default scale over any minor 7th chord, especially the ii7 in a ii-V-I progression.
• IV7 (dominant seventh): The natural 6 appears as a chord tone in this chord, making it a dominant seventh. This dominant IV is impossible in Aeolian and is the harmonic fingerprint of Dorian.
• bVII (major): One whole step below tonic. Common in Dorian vamps and progressions.

Characteristic Tones

The intervals that give Dorian its distinctive sound:

• 6 (natural sixth): The defining Dorian tone. It separates Dorian from Aeolian, transforming the mood from dark to warm. The interval from b3 to 6 forms a tritone (an interval of 6 half steps) that gives the mode its distinctive color.
• b3 (minor third): Establishes the minor quality. Land on it early so the ear registers "minor" before the 6 adds its warmth.
• b7 (minor seventh): No leading tone, no pull to resolve. The b7 keeps Dorian in modal territory rather than driving toward a tonic.

Melodic Applications

Lean on the natural 6 to establish Dorian color -- without it, you are playing Aeolian. The b3-to-6 tritone is especially characteristic; targeting both in a phrase immediately signals "Dorian, not just minor." Over min7 chords, Dorian provides a warmer alternative to natural minor, making it the default choice for jazz and funk minor vamps.

Practice Seeds

6 vs. b6. Play a phrase using the natural 6, then replay it with b6 instead. Hear how one note transforms the mood from warm and jazzy to dark and plaintive -- this is the Dorian-Aeolian divide.

ii-V-I context. Play Dorian over a ii7 chord resolving through a V7 to a I chord. Experience the mode in its most natural functional setting, where it voices the most common minor chord in jazz harmony.

The Dorian tritone. Play b3 and 6 together, then use both as targets in a short phrase. This interval is the harmonic signature that distinguishes Dorian from every other minor mode.

Modal vamp. Loop a min7 chord and improvise freely in Dorian. Experience the mode as a self-contained world -- one where you can stay indefinitely without needing resolution.