In every key
The same shape, moved. The symbols below are spelled the way the app spells them, which is the spelling the chord's own scale asks for rather than whichever accidental is easier to type.
- Cdim7
- Dbdim7
- Ddim7
- Ebdim7
- Edim7
- Fdim7
- F#dim7
- Gdim7
- Abdim7
- Adim7
- Bbdim7
- Bdim7
Voicings
Written in C, because that is the key the encyclopedia authors them in; every one transposes unchanged.
Root Position
C · Eb · Gb · A
intermediate
Inversion 1 (same sound!)
Eb · Gb · A · C
intermediate
Due to symmetry, all inversions are equivalent
Spread Voicing
C · Gb · A · Eb
advanced
Stacked Thirds Spread (1-b5-b3-bb7)
C · Gb · Eb · A
advanced
Symmetric dim7 spread in minor 3rds across an octave
Inversion 2 (b5-bb7-1-b3)
Gb · A · C · Eb
intermediate
2nd inversion — every inversion of dim7 is another dim7
Rootless Upper Tensions (b3-b5-9-13)
Eb · Gb · D · A
expert
Rootless dim7 with the 9 added — diminished-scale color
Where it turns up
Passing chord, creates tension. Symmetrical - any inversion sounds the same. Use between chords a half-step apart.
Commonly swapped with
- C7b9 (no root)
- Any diminished a minor 3rd away
Progressions that use it
Every one of these is written out with the hands on a keyboard and on a stave.