Table of Contents
Augmented sixth chords are an intriguing aspect of music theory that often puzzles beginners. They add tension and color to harmonic progressions, making music more expressive and dynamic. Understanding these chords is essential for students aiming to deepen their grasp of harmony and composition.
What Are Augmented Sixth Chords?
An augmented sixth chord is a type of chord built on the interval of an augmented sixth. It typically involves the notes of the tonic, the lowered sixth, and the raised fourth or fifth, creating a distinctive sound that seeks resolution. These chords are often used in classical and romantic music to create tension before resolving to the dominant or tonic.
Constructing Augmented Sixth Chords
There are three common types of augmented sixth chords: the Italian, the French, and the German. Each has a specific structure and set of notes:
- Italian Augmented Sixth: Consists of the tonic, the lowered sixth, and the raised fourth.
- French Augmented Sixth: Adds the second scale degree to the Italian structure.
- German Augmented Sixth: Includes the lowered sixth, the diminished third, and the tonic.
Resolution of Augmented Sixth Chords
Augmented sixth chords typically resolve outward to the dominant chord. The notes move to form a perfect fifth or a major/minor chord, creating a sense of release and closure. For example, the raised fourth often moves up a half step to the fifth of the dominant, while the lowered sixth moves down to the fifth of the tonic.
Examples in Music
Many classical composers, such as Beethoven and Mozart, skillfully used augmented sixth chords to heighten emotional expression. In jazz and modern music, these chords are often incorporated for color and tension, demonstrating their versatility across genres.
Summary
Understanding augmented sixth chords involves recognizing their structure, how they are built, and how they resolve. Mastery of these chords enriches a musician’s harmonic vocabulary and enhances compositional skills, allowing for more expressive and dynamic music creation.