Information about the diminished seventh interval

Name

This interval is called: Diminished seventh

Abbreviation

You can use the somewhat shorter name "d7" to indicate a Diminished seventh.

Construct

How to build a diminished seventh interval?

To construct an interval correctly you must always use two steps.

  1. Count the amount of naturals used
  2. Count the steps between de two notes

At first, and with easy intervals, this may seem unnecessary, but when advancing to more dificult intervals and musical keys they will become more mandatory.

The following example is for a diminished seventh from C3. Outcome: Bbb3

1.
A Diminished seventh uses 7 naturals.
Example: C3 D3 E3 F3 G3 A3 B3
2.
A Diminished seventh has 9 semitones between the notes.
Example: C3 Db3 D3 Eb3 E3 F3 Gb3 G3 Ab3 A3 Bb3 B3 C4 Db4 D4 Eb4 E4 F4 Gb4 G4 Ab4 A4 Bb4 B4 C5

Cheatsheet

Tranposed for each note

You can use the following cheatsheet to check the Diminished seventh for each root note.
Cb3 ↠ Bbbb3
C3 ↠ Bb3
C3 ↠ Bbb3
C3 ↠ B3
C#3 ↠ Bb3
C3 ↠ B3
Db3 ↠ Cbb4
D3 ↠ C4
D3 ↠ Cb4
D3 ↠ C4
D#3 ↠ C4
D3 ↠ C4
Eb3 ↠ Dbb4
E3 ↠ D4
E3 ↠ Db4
E3 ↠ D4
E#3 ↠ D4
E3 ↠ D4
Fb3 ↠ Ebbb4
F3 ↠ Eb4
F3 ↠ Ebb4
F3 ↠ E4
F#3 ↠ Eb4
F3 ↠ E4
Gb3 ↠ Fbb4
G3 ↠ F4
G3 ↠ Fb4
G3 ↠ F4
G#3 ↠ F4
G3 ↠ F4
Ab3 ↠ Gbb4
A3 ↠ G4
A3 ↠ Gb4
A3 ↠ G4
A#3 ↠ G4
A3 ↠ G4
Bb3 ↠ Abb4
B3 ↠ A4
B3 ↠ Ab4
B3 ↠ A4
B#3 ↠ A4
B3 ↠ A4