Augmented Triad

Definition

An augmented triad is a type of chord formed by stacking two major thirds on top of one another, resulting in a structure that has a root, a major third, and an augmented fifth. This unique combination creates a bright and somewhat dissonant sound, often used to convey tension or instability in music. The augmented triad plays a significant role in tonal composition by adding variety and color to harmonic progressions.

5 Must Know Facts For Your Next Test

1. The augmented triad is built using two major thirds, making its interval structure unique compared to other triads.
2. It can be labeled as a major triad with an altered fifth, specifically raised by one half step.
3. Commonly used in classical and contemporary music, augmented triads create a sense of suspense or anticipation in harmonic progressions.
4. In jazz and modern harmony, augmented triads often function as passing chords or are used to create tension leading into more stable chords.
5. Augmented triads can be transposed easily to different keys while maintaining their unique sound characteristics.

Review Questions

• How does the construction of an augmented triad differ from that of a major or diminished triad?
  • An augmented triad differs from a major triad in that it is made up of two major thirds stacked on top of each other, while a major triad contains a root, major third, and perfect fifth. In contrast, a diminished triad consists of two minor thirds. This structural difference leads to the distinct sound qualities of each triad, with the augmented triad producing a brighter and more dissonant tone due to its raised fifth.
• Discuss how augmented triads can be effectively used within harmonic progressions to enhance musical expression.
  • Augmented triads can add tension and surprise to harmonic progressions, often serving as pivot points leading into more stable chords. For example, they might precede a resolution to a tonic chord, creating an expectation that heightens emotional impact. Additionally, their symmetrical nature allows for smooth transitions between keys or modulation, making them versatile tools for composers looking to explore unique tonal colors.
• Evaluate the role of augmented triads in different musical genres and how they contribute to overall musical texture.
  • Augmented triads play distinct roles across various musical genres. In classical music, they often create tension before resolutions or add color to harmonic sequences. In jazz, they can serve as passing chords or substitutions that enrich harmonic language. Meanwhile, in contemporary styles like rock or pop, their use may evoke specific emotions or thematic elements. By integrating augmented triads into compositions, musicians can enhance the overall texture and emotional depth of their works.

Related terms

Major Triad: A major triad consists of a root note, a major third above the root, and a perfect fifth above the root, creating a consonant and stable sound.

Diminished Triad: A diminished triad is formed by stacking two minor thirds, resulting in a root, minor third, and diminished fifth, creating a tense and unstable sound.

Chord Inversion: Chord inversion refers to the rearrangement of the notes in a chord so that the root is not the lowest note, impacting the chord's voicing and harmonic function.