Ddim7 7-string guitar chord

How to play Ddim7 on 7-string guitar

The most common way, the first shape above: your index finger on the G string at the 1st fret and your middle finger on the high E string at the 1st fret. Let the D and high B strings ring open. Don’t play the low B, low E and A strings.

From the low B string x x x 0 1 0 1 (x: not played, 0: open)

What notes are in Ddim7?

Ddim7, D diminished seventh, is D, F, A♭ and C♭: the root (D), the minor third (F), the diminished fifth (A♭) and the diminished seventh (C♭). Its formula is 1 ♭3 ♭5 ♭♭7.

Why do four diminished seventh chords have the same notes?

A diminished seventh is minor thirds stacked all the way round, D, F, A♭ and C♭, so Ddim7 has the same notes as the diminished sevenths on F, A♭ and C♭. Any of its notes can be the root.