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Diatonic Triads

Diatonic Triads. Kostka /Payne – Chapter 4. Introduction. Most chords in tonal music are made up only of notes from the scale on which the passage is based. That is, if a passage is in G major, most of the chords contain only notes found in the G major scale.

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Diatonic Triads

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  1. Diatonic Triads Kostka/Payne – Chapter 4

  2. Introduction • Most chords in tonal music are made up only of notes from the scale on which the passage is based. That is, if a passage is in G major, most of the chords contain only notes found in the G major scale. • These are called DIATONIC CHORDS.

  3. Diatonic Triads in Major We start with a Major Scale …

  4. Diatonic Triads in Major Then we create triads using only the notes of the scale.

  5. Next we analyze the Qualities. . .

  6. Roman Numerals • To distinguish the triads built on the various scale degrees from the scale degrees themselves, we use roman numerals instead of arabic numerals. (for example, V instead of 5). • The triad type is indicated by the form of the roman numeral itself. (Uppercase or Lowercase)

  7. Roman Numerals

  8. Roman Numerals

  9. Roman Numerals

  10. Roman Numerals

  11. Roman Numerals

  12. Roman Numerals

  13. Roman Numerals

  14. Roman Numerals

  15. Roman Numerals

  16. Roman Numerals You MUST memorize these.

  17. Minor Triads • Remember that we have three forms of the minor scale. • This creates multiple possibilities for diatonic triads in minor. • This is a result of or 6 and 7 scale degrees.

  18. Minor Triads • Notice that the roots of the circled triads above all belong to the harmonic minor scale. • In fact, all notes of the circled triads belong to the harmonic minor scale. (except the 5th of the III chord.)

  19. Minor Triads You MUST memorize the circled chords.

  20. Diatonic Seventh Chords in Major • The chords on each scale degree in major can include a 7th above the root. • The roman numeral system for seventh chords is similar to that of triads.

  21. Seveventh Chords in Major You MUST memorize these.

  22. Seventh Chords in Minor You MUST memorize these too.

  23. Summary Triads T Major I ii iii IV V vi vii° Minor i ii° III iv V VI vii° Seventh Chords Major IM7 ii7 iii7 IVM7 V7 vi7 vii°7 Minor i7 ii°7IIIM7iv7V7VIM7 vii°7 You MUST memorize the chart above.

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