Cool air moving through an open window.
The Chord
The minor seventh adds a minor seventh to a minor triad — a minor third, a major third, then a minor third stacked on top. On C the notes are C, E♭, G, B♭. Both the third and the seventh are flattened, which gives the chord a soft, rounded quality with none of the sharp pull you find in a dominant seventh. The intervals are gentle, the tensions mild, and the whole thing settles into a mellow, slightly melancholy warmth.
Unlike its diminished and half-diminished cousins, the minor seventh keeps its perfect fifth, so it stays grounded. It is stable enough to sit on and colourful enough to stay interesting — a chord you can live inside without needing it to go anywhere in particular.
Structure
| Attribute | Value |
|---|---|
| Formula | 1 ♭3 5 ♭7 |
| Notes (on C) | C E♭ G B♭ |
| Symbol | Cm7 |
| Quality | Mellow, cool, the ii and vi of jazz |
Character
The minor seventh is understated and cool. It carries the introspection of a minor triad but softens it with the added seventh, trading sadness for something more like poise or quiet contemplation. It sounds urban and nocturnal, equally suited to a smoky ballad and a laid-back groove. Where the minor triad can ache, the minor seventh mostly sighs.
In Practice
The minor seventh is the workhorse of jazz harmony, the ii and vi chords that make the classic ii–V–I progression turn. It anchors soul, R&B, funk, and neo-soul, where its smooth voicing sits perfectly under a vocal. As the ii it sets up the dominant; as the vi it offers a gentle detour from the tonic. It is the Minor Triad extended, and the natural partner to the Dominant Seventh in a turnaround.