Mozart
Viennese
Piano Sonatina
No. 1
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Good Features:
- Jagged edge between C major and G major keys indicates the
region of modulation where the chords
are common to both C and G majors.
- The brief modulation into D minor shows up a vertical
band of purple towards the center of the movement.
- The movement is clearly in C major, since the top right and left
sides of the picture are predominantly green.
- There is a distiction between the F modulation near the
middle of the piece (yellow=F) and the temporary modulation
(tonicization) of F closer to the end of the piece. The tonicization
does not extend towards the top of the pieces as well as the
true modulation.
Problems:
- The key of F near the center of the movement does not show up
as well as it should. This is due to the Dominant chord in
F major (which has a root on C).
- The key of G has an unusual extension over the second half of the
piece. Perhaps this is an averaging effect. There are a lot of
G chords in the second half of the piece, but they do not show any
strength as keys until the top level subdivision of the movement.
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