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# Doubly augmented sixth

In music theory, a doubly augmented sixth is an interval that has eleven half steps (semitones). Explanations and excerpts from famous works

In music theory, a doubly augmented sixth is an interval that has eleven half steps (semitones ).

The doubly augmented sixth requires that:

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

## What does a doubly augmented sixth look like?

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

## How to recognize a doubly augmented 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 C / A♯♯:

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

From the rule stated above, the interval C / A is a major sixth, so the interval C / A♯ is an augmented sixth, and so the interval C / A♯♯ is a doubly augmented sixth.

## Inversion of the doubly augmented sixth

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

Here is an example of a doubly diminished third:

## Musical examples of doubly augmented 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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