About the D flat major seven chord
D flat major seven is used in D flat Major, where its notes spell the I chord. Think of it as a D♭ major seventh chord.
Its notes are D♭, F, A♭, and C. The intervals are a major third, a perfect fifth, and a major seventh.
Also called Δ7 and M7. C sharp major seven spells the same notes enharmonically. In shorthand it is commonly written Dbmaj7.
Inversions
D flat major seven (root position)
Notes and intervals
| 1 | DbD♭ | Root |
|---|---|---|
| 2 | FF | Major 3rd |
| 3 | AbA♭ | Perfect 5th |
| 4 | CC | Major 7th |
Shapes
Chromatic
Circle of Fifths
Keys that use D flat major seven
D flat major seven is diatonic to these keys, where its notes spell the chord shown.
Other D flat chords
Simpler triads
Suspended
Sixths and sevenths
Extensions
Altered
Functional relationships
These chords are where this one most naturally comes from and resolves to inside a key.
Relative minor
The relative minor uses the same notes and key signature, so it works as a calmer, darker home base.
Parallel minor
The parallel minor keeps the same root note but lowers the third, giving the same key a darker, sadder sound.
Dominant
The dominant is a fifth above the root, and it builds tension that pulls strongly back to this chord.
Subdominant
The subdominant is a fourth above the root (a fifth below), and it usually leads on to the dominant or back home.
Tritone substitution
The tritone substitution stands in for this chord's dominant with a dominant seventh a half step above the root, which slides down by a half step to resolve here.
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