Augmented Triads

Definition

An augmented triad is a type of chord consisting of a root, a major third, and an augmented fifth. This unique structure gives the chord its distinct sound, often described as bright or tense. Augmented triads play an important role in harmony and voice leading, especially when used in the context of secondary dominant chords, creating movement and tension that resolves to more stable harmonies.

5 Must Know Facts For Your Next Test

1. Augmented triads can be built on any note and are labeled by the root note followed by 'aug' (e.g., Caug).
2. In voice leading, augmented triads often resolve upward by half step to another chord, which enhances their tension-releasing qualities.
3. These triads are commonly used in jazz and modern classical music for their unique color and emotional effect.
4. An augmented triad can also function as a passing chord in progressions, connecting more stable chords.
5. They can appear in both major and minor keys, adding interest and complexity to harmonic progressions.

Review Questions

• How do augmented triads function within harmonic progressions, particularly in relation to secondary dominants?
  • Augmented triads serve as significant tension-building chords in harmonic progressions, particularly when associated with secondary dominants. They often lead to resolutions that create a sense of forward motion. By using augmented triads in this context, composers can create unexpected shifts that add depth to the overall musical narrative.
• Compare the sound and usage of augmented triads with diminished triads in voice leading.
  • Augmented triads produce a bright and tense sound that typically resolves upward by half step, creating an uplifting motion. In contrast, diminished triads have a darker tone and often resolve downward or to adjacent chords. Both types of triads contribute different colors to voice leading; however, augmented triads are generally favored for their ability to create dramatic contrasts within progression.
• Evaluate the role of augmented triads in modern music styles versus classical compositions.
  • In modern music styles like jazz or pop, augmented triads are frequently utilized for their unique emotional resonance and colorful harmonic possibilities. Composers often employ these chords to evoke specific feelings or create tension before resolving to more stable harmonies. In classical compositions, while still important, augmented triads may be used more sparingly, serving primarily as transitional elements or for dramatic effect during climactic moments.

Related terms

Major Triad: A chord made up of a root, a major third, and a perfect fifth, which has a stable and consonant sound.

Diminished Triad: A chord consisting of a root, a minor third, and a diminished fifth, which creates a darker and more unstable sound compared to augmented triads.

Secondary Dominant: A dominant seventh chord that temporarily tonicizes a chord other than the main tonic, leading to heightened tension and resolution in harmonic progressions.