Tuesday, September 10, 2019

Videos on secondary leading-tone chords (watch for Thursday 9/12)

See videos (part 1 and part 2) introducing secondary leading-tone chords. There will be a mini-quiz Tuesday.

I go over a handout. Here are the bullet points:
  • Just as a diatonic leading tone (LT) chord can substitute for the dominant, a secondary LT chord can be used to tonicize a chord 
  • Secondary LT chord may be a triad or 7th chord 
  • (Triads barely mentioned in textbook) 
  • Part-writing, qualities, etc. are analogous to diatonic LT chords: 
    • Triads will typically occur only in 6/3 position (viiº6/X) 
    • LT 7th chords can be half-diminished (viiø7/X) or fully diminished (viiº7/X) 
    • Fully diminished may tonicize any quality; half-diminished typically only tonicizes a MAJOR chord 
    • (If using viiø7/X beware parallel 5ths) 
    • Voice-leading into and especially resolving secondary LT chords should be stepwise/common tones to the extent possible, including: 
      • Applied leading tone should go to what it’s leading to 
      • Chordal 7th must resolve down by step 
  • Secondary LT chords may appear in any inversion, although:
    • Root position probably most common 
    • Third inversion probably least common

No comments:

Post a Comment