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

Doubly diminished sixth

In music theory, a doubly diminished sixth is an interval that has six half steps united states of america (semitones united kingdom).

The doubly diminished sixth requires that:

- The interval must be a sixth interval (six note names between the first and the last).
- The interval must have six half steps.

What does a doubly diminished sixth look like?

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

doubly diminished sixth

How to recognize a doubly diminished sixth?

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 / G♭♭:

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

B major scale

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

Inversion of the doubly diminished sixth

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

Here is an example of a doubly augmented third:

Doubly augmented third

Musical examples of doubly diminished sixth

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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