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Understanding Harmony and Triads in Music Theory

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Chapter 4 explores the essence of harmony, detailing how melodies and chords interact. Harmony results from tones sounding simultaneously, with triads as the fundamental building blocks of chords. This chapter defines key concepts such as major, minor, diminished, and augmented triads, including their stability and construction. You'll learn about the significance of the root note and how triads derive their names based on their scale degrees. This foundational knowledge is vital for understanding musical relationships in theory and practice.

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Understanding Harmony and Triads in Music Theory

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  1. Chapter 4 Chords – Part 1

  2. Harmony • Harmony is the musical result of tones sounding together. • Melody – Horizontal (linear) • Harmony – Vertical

  3. Chord • A harmonic unit with at least three different tones sounding simultaneously.

  4. Triad • A three-tone chord. • We usually use the term TERTIAN (chords containing a superposition of harmonic thirds) • Superimpose – place on above something else.

  5. Triad Root • The term ROOT refers to the note on which the triad is built. • C major triad refers to a major triad whose ROOT is C. • The root is the pitch from which a triad is generated. • 4 in common use identified by the quality names; major, minor, augmented and diminished.

  6. Major Triad • A MAJOR TRIAD consists of a major third and a perfect 5th.

  7. Minor Triad • Consists of a minor third and a perfect fifth.

  8. Diminished Triad • Consists of a minor third and a diminished fifth.

  9. Augmented Triad • Consists of a major third and an augmented fifth.

  10. Triad Construction • Each triad includes a ROOT, THIRD and a FIFTH.

  11. Triad Stability • Major Triad – Strongest and most stable • Minor Triad – Strong and quite stable • Diminished Triad – Weak and unstable • Augmented Triad – Weak and unstable

  12. Triad Names • You can construct a triad on any of the scale degrees. • The triad has the same function name as the individual pitch. • Both the pitch C and the C major triad are the tonic.

  13. Triad Names

  14. Primary Triads • Triads built on the tonic, subdominant and the dominant are often referred to as the PRIMARY TRIADS because of their strong relationships to each other.

  15. Homework • Homework and classwork: Due Friday, October 11 – Workbook 4 ABCD Online Tests: 30 minutes. • http://www.musictheory.net/exercises/chord/drwy9yxyybby

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