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TMU131H Music Theory II: Mozart K545
13
Transcript
A G F E
G major: 1-473-6251
* Memorize this 'phone number':
the pattern of the root movements
in a descending 5th sequence
Development:
G minor
D minor
A minor
equals
Next:
expanding the
A-G-F-E
compound melody
D has been avoided thus far, so its entrance is significant:
it signals the move to dominant harmony (it's the 5th of the G+ triad)
Re
Doh
Ti
A G F E
Soh
Fi
Fa
important chromatic passing note
between F and G (fa-fi-soh)
introduces the leading note of the new key of G+
Mozart?
take flight
ground
(This V4/3 is secondary
in importance to I)
--------------------------------------------------------expanding/prolonging tonic harmony-----------------------------------------
* The usual choice!
(In a movement in sonata form, expect the 2nd theme to be in the tonic key)
! This D-C-B-A (descending 5th/"D2") pattern
we've heard before - in the A-G-F-E of the opening theme!
D-C-B-A
Second theme restated in the tonic key. *
*
in G:
A-C-E
1 4 7 3 6 2
B-D-F#
E-G-B
F#-A-C
G-B-D
C-E-G
Recapitulation? *
G major:
MI
cadential 6/4
5 1
ii6
G-B-D
D-F#-A
F
G
A
One reason for his decision
might be that F could be
interpreted as the beginning
of G's descent (see m.1)
to the final C.
DOH
RE
A
F
End of the Exposition
and so on...
m.6 = G (bass E)
m.7 = F (bass D)
m.8 = E (bass C)
(with the left hand
supporting the descent
in parallel 10ths)
V7
I
Doh
until...
E
Re
WHAM!!!
How important is D?
- it's given 2 full bars
- it's given its own 'tonality'
(D minor scale, complete with
the first accidental we've seen)
Fi
Fa
Re
Mi
Fa
(landing)
(there's also that descending 4th pattern again, this time F-E-D-C)
2nd theme begins with
an inversion of the
original C-E-G tonic triad!
Ti
Second (subordinate) theme in G major
viio7 of V
Soh
repeat 2-measure basic idea
Doh
(terra firma)
* Not your usual choice of key for a recapitulation!
* This pattern is NOT a sequence of descending 5ths; what is it, and why has Mozart chosen to use it here?
Why? Because one goal of the composer
in the Development section is to
get rid of the 'intruder' key (G+ here)
so moving in the opposite direction
from what is 'normal' i.e. ascending 5ths
(or think of it also as descending 4ths)
creates a feeling of aimlessness - by the
time A minor arrives here our memory of
G major as the 'centre of the universe'
has gone completely out the window.
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