# Doubly diminished fifth

In music theory, a doubly diminished fifth is an interval that has five half steps (semitones ).

The doubly diminished fifth requires that:

- The interval must be a fifth interval (five note names between the first and the last).

- The interval must have five half steps.

## What does a doubly diminished fifth look like?

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

## How to recognize a doubly diminished fifth?

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 F♯ / C♭:

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

From the rule stated above, the interval F♮ / C♮ is a perfect fifth, so the interval F♯ / C♮ is a diminished fifth, and so the interval F♯ / C♭ is a doubly diminished fifth.

## Inversion of the doubly diminished fifth

The inversion of the doubly diminished fifth is the doubly augmented fourth.

Here is an example of a doubly augmented fourth:

## Musical examples of doubly diminished fifth

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

## Interval identification game

You will find this interval in my Intervals identification game: