Ddim7 Guitar Chord (D Diminished 7th)

Ddim7 has 4 notes: D, F, A♭ and C♭. Its formula is 1 – ♭3 – ♭5 – 𝄫7: D is the root, F a minor 3rd, A♭ a diminished 5th and C♭ a diminished 7th above it. C♭ is the same key as B.

Written C𝄪°7, it is vii°7 in D♯ minor (harmonic minor, with the raised 7th). The other chords of D♯ minor are D♯m, E♯°, F♯, G♯m, A♯m and B.

The shape in the main diagram is xx0101 (open position).

1. Put your middle finger (2) on the 1st fret of the G (3rd) string.
2. Put your ring finger (3) on the 1st fret of the high E (1st) string.
3. Let the D (4th) and B (2nd) strings ring open (marked O).
4. Don't play the low E (6th) or A (5th) strings (marked X).
5. Strum from the D (4th) string down (4 strings).

A diminished 7th chord is a diminished chord plus a diminished 7th (1–♭3–♭5–𝄫7): four notes, each a minor 3rd apart. It is written dim7 or °7. Only three different diminished 7th chords exist, and each one has four names.

This page shows 4 shapes: xx0101 (open position), x-8-0-10-9-7 (open position), x56464 (at the 4th fret) and 10-11-12-10-12-10 (at the 10th fret). All of them contain the chord's essential notes.

No: the easiest shape (xx0101) has no barre and uses 2 fingers, so it is one of the easier chords to learn. (Difficulty here is a rough guide based on barres, stretches and the number of fingers.)