D Minor 7th
m7
0 - 3 - 7 - 10Minor + minor 7th
About D Minor 7th
D minor seventh is a compact four-note chord that guitarists reach for constantly and beginners often meet by accident: lift the middle finger from D minor and the chord is already there. Its notes — D, F, A, C — contain no sharps or flats, which is why it belongs to the two most-used keys on the instrument.
The notes
D, F, A, C. The C is the seventh, and in the open shape it sits on the B string at the first fret. Only four strings sound, with the open D as the root.
The chord contains the same notes as F major with a D underneath, which is why it can substitute for F in a progression — the difference is only which note the bass takes.
Voicings
The open shape is the standard. A fifth-fret barre with the root on the A string gives the movable version, and a tenth-fret voicing on the middle strings is what jazz players use when they need to leave room below.
The open form is bright and slightly thin because it has no low notes. In a band that suits it; alone it usually wants the bass note reinforced.
Where it shows up
As the ii of C major and the vi of F. The ii–V–I in C — Dm7, G7, Cmaj7 — is the first progression taught in almost every jazz course, and this chord opens it.
In folk and pop it stands in for D minor whenever a section stays on the chord long enough for the plain triad to feel static. The added seventh is what keeps it moving.