Music theory > Lessons > Pitch of sounds > Intervals > Doubly augmented seventh

# Doubly augmented seventh

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

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

The doubly augmented seventh requires that:

• The interval must be a seventh interval (seven note names between the first and the last).
• The interval must have thirteen half steps.

## What does a doubly augmented seventh look like?

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

## How to recognize a doubly augmented seventh?

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 A♭ / G♯♯:

Let's take the A flat major scale to have A♭ as the tonic:

From the rule stated above, the interval A♭ / G♮ is a major seventh, so the interval A♭ / G♯ is an augmented seventh, and so the interval A♭ / G♯♯ is a doubly augmented seventh.

## Inversion of the doubly augmented seventh

We can consider that the inversion of the doubly augmented seventh does not exist.

## Musical examples of doubly augmented seventh

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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