# Augmented Fourth Intervals

# Augmented Fourth Intervals

A **augmented fourth** interval is the distance from any note to a note six
half-steps away either ascending or descending.
It is a dissonant interval.

*Be sure your guitar is in tune before playing the following examples.*

## A Augmented Fourth Interval on the Guitar

An augmented fourth *above* **A** is **D#**.

## Bb Augmented Fourth Interval on the Guitar

An augmented fourth *above* **Bb** is **E**.

## B Augmented Fourth Interval on the Guitar

An augmented fourth *above* **B** is **E#**. Notice that E# is actually an F
note. However, an F above B is a
diminished fifth.
Also notice that a perfect fourth above B is E.
An augmented fourth is one more half-step than a perfect fourth.
Therefore, to indicate this is an augmented fourth an E# is used.

*Note: Cb is a B. A major second above Cb is F.*

## C Augmented Fourth Interval on the Guitar

An augmented fourth *above* **C** is **F#**.

*Note: B# is a C. A augmented fourth above B# is Ex (double sharp).*

## Db (C#) Augmented Fourth Interval on the Guitar

An augmented fourth *above* **Db** is **G** and an augmented fourth *above*
**C#** is **Fx** (F double sharp). Notice that Fx is actually a G
note. However, a G above C# is a
diminished fifth.
Also notice that a perfect fourth above B is E.
An augmented fourth is one more half-step than a perfect fourth.
Therefore, to indicate this is an augmented fourth an E# is used.

## D Augmented Fourth Interval on the Guitar

An augmented fourth *above* **D** is **G#**.

## Eb (D#) Augmented Fourth Interval on the Guitar

An augmented fourth *above* **Eb** is **A**.

An augmented fourth *above* **D#** is **Gx** (double sharp).
Notice that Gx is actually an A note. However, an A above D# is a
diminished fifth.
Also notice that a perfect fourth
above D# is C. An augmented fourth above G# is one more half-step than a perfect fourth
above G#. Therefore, to indicate this is an augmented fourth a Cx is used.

## E Augmented Fourth Interval on the Guitar

An augmented fourth *above* **E** is **A#**.

*Note: Fb is an E. An augmented fourth above Fb is Bb.*

## F Augmented Fourth Interval on the Guitar

An augmented fourth *above* **F** is **B**.

*Note: E# is an F. An augmented fourth above E# is Ax (double sharp).*

## F# (Gb) Augmented Fourth Interval on the Guitar

An augmented fourth *above* **F#** is **B#**.
Notice that B# is actually a C note. However, a C above F# is a
diminished fifth.
Also notice that a perfect fourth
above F# is B. An augmented fourth above F# is one more half-step than a perfect fourth
above F#. Therefore, to indicate this is an
augmented fourth a B# is used.

An augmented fourth *above* **Gb** is **C**.

## G Augmented Fourth Interval on the Guitar

An augmented fourth *above* **G** is **C#**.

## Ab (G#) Augmented Fourth Interval on the Guitar

An augmented fourth *above* **Ab** is **D**.

An augmented fourth *above* **G#** is **Cx** (double sharp).
Notice that Cx is actually a D note. However, a D above G# is a
diminished fifth.
Also notice that a perfect fourth
above G# is C. An augmented fourth above G# is one more half-step than a perfect fourth
above G#. Therefore, to indicate this is an augmented fourth a Cx is used.