The Leading-Tone 7th Chord

Question 1

What is it?

Answer 1

a seventh chord based on the leading tone

serves a dominant function - wants to move to tonic

Question 2

Fully and half diminished

Answer 2

fully diminished (no strike through) in harmonic minor
half diminished in major

usually a composer willl borrow the lowered 6th scale degree from the paralell minor to have fully diminished in major

MODE MIXTURE

Question 3

viiº7 functions

Answer 3

like V6/5

neighbouring chord to root-position tonic

Question 4

viiº6/5 functions

Answer 4

like V4/3

passing chord between i and i6

Question 5

viiº4/3 functions

Answer 5

like V4/2

passing chord between V and i6
neighbouring chord to i6

Question 6

viiº4/2 functions

Answer 6

rarely seen

if you do see it its usually functioning as a neighbour to root-position V7

Question 7

resolving viiº7ths

Answer 7

the chord seventh (scale degree 6) is approached by step or common tone and must resolve down by step to scale degree 5

scale degree 4 resolves down to 3

scale degree 2 usually resolves up to 3 but sometimes resolves down to tonic

scale degree 7 (leading tone) must resolve up to tonic

Question 8

half-diminished 7th functions

Answer 8

usually seen as neighbour to I harmonizing

5-6-5 in the soprano