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Information about the diminished third interval

Name

This is the diminished third interval.

Abbreviation

This interval is abbreviated with d3.

Practice the d3 interval

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Construct

How to construct the diminished third interval?

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

1 • Count the amount of naturals used
2 • Count the semitone steps between the two notes

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

The following example is for a minor second from C3. Outcome: E3

1 • The diminished third spans 3 naturals.
C3  ↠  D3  ↠  E3
2 • The diminished third has 24 semitones between the notes.
C3  ↠  D3  ↠  D3  ↠  E3  ↠  E3  ↠  F3  ↠  G3  ↠  G3  ↠  A3  ↠  A3  ↠  B3  ↠  B3  ↠  C4  ↠  D4  ↠  D4  ↠  E4  ↠  E4  ↠  F4  ↠  G4  ↠  G4  ↠  A4  ↠  A4  ↠  B4  ↠  B4  ↠  C5

Cheatsheet

The diminished third transposed from each note

C
Eb
C
E
C
E
D
F
D
F
D
F
E
G
E
G
E
G
F
Ab
F
A
F
A
G
Bb
G
B
G
B
A
C
A
C
A
C
B
D
B
D
B
D

Practice the d3 interval

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Chords

Which chords use the diminished third interval?

Scales

Which scales use the diminished third interval?

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