Ddim7 8-string bass chord

How to play Ddim7 on 8-string bass

The most common way, the first shape above: lay your index finger flat across the four strings from the A to the C at the 5th fret, your middle finger on the D string at the 6th fret, your little finger on the G string at the 7th fret and your ring finger on the F string at the 6th fret. Don’t play the F♯, B and E strings.

From the F♯ string x x x 5 6 7 5 6 (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.