Music theory > Lessons > Pitch of sounds > Intervals > Doubly diminished third

Doubly diminished third

In music theory, a doubly diminished third is an interval that has only one half step united states of america (semitone united kingdom).

The doubly diminished third requires that:

- The interval must be a doubly diminished third interval (three note names between the first and the last).
- The interval must have only one half step.

What does a doubly diminished third look like?

Here is an example of a melodic doubly diminished third (two music notes in a melody) and a harmonic doubly diminished third (in a chord):

Doubly diminished third

How to recognize a doubly diminished third?

Rule of music theory: All intervals in a major scale starting with the tonic (degree I) are either major or perfect, and only unison, octave, fourth and fifth are perfect (the others are major).

Example with the interval B / D♭♭:

Let's take the B major scale to have B as the tonic:

B major scale

From the rule stated above, the interval B / D♯ is a major sixth, so the interval B / D♮ is a minor sixth, so the interval B / D♭ is a diminished sixth, and so the interval B / D♭♭ is a doubly diminished third.

Inversion of the doubly diminished third

The inversion of the doubly diminished third is the doubly augmented sixth.

Here is an example of a doubly augmented sixth:

Doubly augmented sixth

Musical examples of doubly diminished third

No examples yet, but feel free to send me some examples!

Interval identification game

You will find this interval in my Intervals identification game:

Find all my music theory games by clicking this link music theory games
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