Can an augmented sixth lead straight to tonic?

Can an Augmented Sixth Lead Straight to Tonic?

Augmented sixth chords are a fascinating harmonic phenomenon in music theory. They are typically used as chromatic predominant chords that resolve to the dominant, creating tension and leading to a sense of musical resolution. However, there is a question that arises: Can an augmented sixth chord lead straight to the tonic? In this article, we will explore this topic and shed light on the possibilities and characteristics of augmented sixth chords.

Understanding Augmented Sixth Chords

Before delving into whether an augmented sixth chord can resolve to the tonic, let’s first understand the basics of these chords. Augmented sixth chords are unique in that they have no root and are identified by the interval of an augmented sixth between two specific tones, often labeled as “le” and “fi.” These chords are best thought of as a collection of tones on certain scale degrees rather than having a traditional root, third, etc.

There are three main types of augmented sixth chords: Italian, French, and German. These types differ in the specific tones and intervals they contain, adding to their distinct character and function within harmonic progressions.

Function and Resolution

Augmented sixth chords are considered pre-dominant function chords, meaning they pull the ear towards the dominant chord. Their dissonant nature creates tension and a desire for resolution. Traditionally, augmented sixth chords resolve to the dominant, reinforcing the dominant-tonic relationship and providing a sense of closure.

However, it is worth noting that augmented sixth chords can also be used to resolve to the tonic, although this is less common. The tonic is probably the second most popular destination for augmented sixth chords after the dominant. This alternative resolution to the tonic adds a unique twist to harmonic progressions and can create unexpected musical effects.

In some cases, a cadential six-four chord may intervene between the augmented sixth chord and the dominant. This chord progression, known as the cadential six-four, adds further harmonic complexity and can enhance the resolution to the dominant or tonic.

Resolution of the Augmented Sixth Interval

One crucial characteristic of augmented sixth chords is the resolution of the augmented sixth interval itself. The augmented sixth interval has a strong pull outward, desiring resolution to an octave on the fifth scale degree. This resolution provides stability and a sense of resolution to the overall harmonic progression.

Conclusion

Augmented sixth chords offer a unique and versatile harmonic tool in music theory. While they are typically associated with resolving to the dominant, they can also resolve to the tonic, albeit less frequently. Understanding the different types of augmented sixth chords, their function, and resolution possibilities allows composers and musicians to explore a wide range of expressive possibilities and create harmonic tension and resolution in their compositions.

Sources:

Music: Practice & Theory Stack Exchange. “Can an augmented sixth lead straight to tonic?” https://music.stackexchange.com/questions/87866/can-an-augmented-sixth-lead-straight-to-tonic.
Open Music Theory. “Augmented Sixth Chords.” https://viva.pressbooks.pub/openmusictheory/chapter/augmented-sixth-chords/.
Music Theory Teacher. “Augmented Sixth Chords.” http://www.musictheoryteacher.com/pb/wp_4c673257/wp_4c673257.html.

FAQs

What is an augmented sixth chord?

An augmented sixth chord is a unique harmonic structure that lacks a traditional root and is identified by the interval of an augmented sixth between specific tones. It is best understood as a collection of tones on certain scale degrees rather than having a root, third, etc.

What are the different types of augmented sixth chords?

What is the typical function of augmented sixth chords?

Augmented sixth chords are generally considered pre-dominant function chords. They create tension and pull the ear towards the dominant chord, setting up a sense of resolution and closure in the harmonic progression.

Can an augmented sixth chord resolve to the tonic?

While augmented sixth chords are primarily associated with resolving to the dominant, they can also resolve to the tonic, although this is less common. The tonic is the second most popular destination for augmented sixth chords after the dominant, providing an alternative resolution and adding unique harmonic effects.

How does an augmented sixth chord resolve to the tonic?

When an augmented sixth chord resolves to the tonic, the augmented sixth interval typically resolves outward to an octave on the fifth scale degree. This resolution provides stability and a sense of resolution to the overall harmonic progression.

Can a cadential six-four chord intervene between the augmented sixth chord and the tonic?

Yes, it is possible for a cadential six-four chord to intervene between the augmented sixth chord and the tonic. This chord progression, known as the cadential six-four, adds further harmonic complexity and can enhance the resolution to the dominant or tonic.

Are augmented sixth chords considered dissonant?

Yes, augmented sixth chords are considered dissonant due to the presence of the augmented sixth interval. This dissonance creates tension and a desire for resolution, leading to a sense of harmonic motion and resolution in the music.

How are augmented sixth chords best utilized in compositions?

Augmented sixth chords offer composers a versatile harmonic tool for creating tension, resolution, and expressive effects in their compositions. They are often used as chromatic predominant chords but can also be employed to add complexity and unexpected harmonic twists to a piece.