What Are Augmented Sixth Chords in Music Theory?

What Are Augmented Sixth Chords in Music Theory?

Posted on November 17, 2025 by Emmeline Pankhurst

Quick Answer

Augmented sixth chords are intriguing elements in music theory, celebrated for their unique interval structure. They serve as effective bridges, creating tension and resolution within a piece. These chords are categorized into three types based on their national origins: Italian, French, and German. In essence, augmented sixth chords add drama and complexity to music, making them invaluable tools for composers aiming to enrich their compositions. Understanding their characteristics unlocks a world of creative possibilities, inviting exploration of their distinct qualities and applications.

What Are Augmented Sixth Chords?

Augmented sixth chords are like a secret spice in a composer’s toolkit, adding a special flavor to music that can transform a piece’s emotional landscape. These chords are built around an augmented sixth interval, which is larger than a perfect sixth by one half step. This interval gives these chords their name and distinctive sound.

The structure of an augmented sixth chord is intriguing. Typically, these chords feature three or four notes that create tension, yearning to resolve to something more stable. For example, in the key of C major, an augmented sixth chord might include the notes A♭, F, and D♮. The interval between A♭ and F is a minor sixth, but with D♮ added, we achieve the magical augmented sixth interval from A♭ to F♯ (enharmonically G♭).

These chords primarily function to lead us towards the dominant chord, creating anticipation and motion. They serve as a musical nudge, propelling us forward. Imagine being on a roller coaster, poised at the top of a hill, feeling the tension before the exhilarating drop—that’s the role of these chords, setting the stage for resolution and excitement.

I recall teaching a student struggling with this concept until I likened it to the moment before a big surprise—like holding your breath just before someone shouts “surprise” at a party. With this understanding, one might wonder about the origins of their names, leading us to explore their cultural and historical roots.

Why Are They Called Italian, French, and German?

Travel back to the rich soundscapes of the Baroque and Classical periods, where composers were akin to modern-day chefs, each with their unique recipe to enhance their musical dishes. Augmented sixth chords became a continental favorite, with each region adding its own twist, much like regional variations in pasta dishes or pastries.

These chords were named after Italy, France, and Germany because composers from these regions prominently used them, each bringing a unique flavor to the musical table. The Italian augmented sixth chord, with its streamlined simplicity, is the margherita pizza of chords—straightforward and delicious. The French version adds a touch more flair, while the German variant, with its rich, dense texture, resembles a hearty stew that warms you on a winter’s night.

Cultural influences shaped these naming conventions. During the Baroque and Classical eras, Italy stood as the heart of opera and lyrical music. French composers, known for their sophisticated harmonic language, introduced a certain je ne sais quoi. Meanwhile, the German tradition emphasized structure and complexity, influencing musical thought and education. Interestingly, the “Italian,” “French,” and “German” ethnic labels for augmented-sixth chords were first coined in 1806 in John Wall Calcott’s A Musical Grammar.

This continental naming not only highlights historical origins but also paints an auditory map of European musical traditions. The differences between these chords reflect diverse approaches to tension and resolution, a theme that ties beautifully into understanding each chord type’s distinct application and sound.

How Do These Chords Differ?

Italian, French, and German augmented sixth chords each have unique structures, contributing to their distinct sounds and uses in music.

I once worked with a student who loved Chopin. When we encountered a German augmented sixth chord in his work, the student commented on its “unexpected richness,” like discovering a hidden ingredient in a familiar dish.

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Exploring these chords deepens our understanding of how composers use them to create emotional shifts and musical narratives, prompting us to consider their broader role in composition.

What Is Their Role in Music Composition?

In music composition, augmented sixth chords are unsung heroes, subtly guiding the narrative of a piece. Their primary role revolves around exceptional voice-leading properties, creating a seamless journey between harmonic destinations and helping composers craft smooth, compelling transitions.

The magic lies in the augmented sixth interval, which naturally resolves outward to the dominant chord. Imagine two magnets pulling towards each other—this is how these chords work, propelling the music forward with purpose. When teaching, I often compare this to a well-timed plot twist in a novel, where an unexpected turn keeps readers (or listeners) on edge.

Throughout history, augmented sixth chords have profoundly influenced composers and music theory development. Composers like Beethoven, Chopin, and Wagner used these chords to push harmonic boundaries, crafting innovative and emotionally charged works. Their use of augmented sixth chords demonstrated a deep understanding of tension and release, shaping the emotional arc of their compositions.

These chords have also sparked academic interest, enriching our understanding of harmony in Western music theory. For a deeper analysis, consider Dan Harrison’s “Supplement to the Theory of Augmented-Sixth Chords”. Exploring and analyzing augmented sixth chords bridges classical and modern harmonic practices, showing how traditional concepts can inspire contemporary creativity.

As we delve deeper into these chords, we’ll uncover how to identify and incorporate them into our musical endeavors. Understanding their role in composition is just the beginning—next, we’ll discover how to bring these fascinating chords to life in your music.

How to Identify and Use Them in Music?

Identifying augmented sixth chords in music can be as rewarding as finding a hidden gem. Listen for the distinctive tension—like the moment before a rubber band snaps. This tension usually resolves to a dominant chord, your first clue. When analyzing sheet music, look for the augmented sixth interval, often between the lowest and highest notes within the chord. In C major, spotting an A♭ and F♯ together is a telltale sign of an augmented sixth chord. If you ever struggle to remember the name of a piano chord or scale, a flexible music theory app like Piano Companion can help you find it by key or even using your external MIDI keyboard, making the identification process much smoother.

Incorporating these chords into your compositions is like adding color to a black-and-white sketch. They can heighten drama or guide the listener through a transition. When writing, consider the emotion you want to convey—do you want to build suspense or add an unexpected twist?

Here are some practical tips:

  • Create Tension: Use the Italian augmented sixth chord for a simple yet effective tension-building tool, ideal for a dramatic lead-in to a key change.
  • Add Complexity: For weaving in complexity, the German version acts like a rich tapestry, adding layers to your musical narrative.
  • Evoke Elegance: The French chord, with its added note, provides an elegant twist, akin to a surprising plot twist in a story.

From personal experience, experimenting with these chords is both challenging and rewarding. It’s like cooking without a recipe—initially daunting, but ultimately satisfying. As you explore these musical flavors, you’ll find they offer countless opportunities to enrich your compositions. Consider how these insights might influence your next piece and think about the creative possibilities they unlock.

Key Takeaways

  • Augmented sixth chords enhance music’s emotional depth, acting as a bridge to tension and resolution.
  • Understanding Italian, French, and German variants enriches compositional versatility.
  • These chords were named for their regional origins and reflect cultural influences in music history.
  • Spotting an augmented sixth interval helps identify these chords in compositions.
  • Incorporate them to add drama, complexity, or elegance to your music.

Embrace these musical spices to transform your compositions and embark on a journey of creative discovery.