Augmented sixth

In music theory, an augmented sixth is an interval that has ten half steps united states of america (semitones united kingdom).

The augmented sixth requires that:

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

What does an augmented sixth look like?

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

augmented sixth

How to recognize an 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 D♭ / B♮:

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

D flat major scale

From the rule stated above, the interval D♭ / B♭ is a major sixth so the interval D♭ / B♮ is an augmented sixth.

Inversion of the augmented sixth

The inversion of the augmented sixth is the diminished third.

Here is an example of a diminished third:

Diminished third

Musical examples of 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
music theory games

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