The chords in the key
Each note of the scale builds a chord. The four-note versions add the seventh.
| Degree | Chord | Notes | Role | With seventh |
|---|---|---|---|---|
| I | A♭ | A♭ – C – E♭ | Tonic: home | A♭maj7 |
| ii | B♭m | B♭ – D♭ – F | Subdominant | B♭m7 |
| iii | Cm | C – E♭ – G | Tonic substitute | Cm7 |
| IV | D♭ | D♭ – F – A♭ | Subdominant | D♭maj7 |
| V | E♭ | E♭ – G – B♭ | Dominant: tension | E♭7 |
| vi | Fm | F – A♭ – C | Relative tonic | Fm7 |
| vii° | Gdim | G – B♭ – D♭ | Dominant (leading tone) | — |