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The piece is in Ab major.

In mm.7-8 a cadence appears and there are several non-chord tones with accidentals.

I attempted to label chord symbols on my own, but they are very uncharacteristic of classical music.

Over the course of reading this book(the excerpt is an exercise from the book), I have always expected accidental notes to mean something like modulation and applied chords.

How would you label these cadence chords?

2
  • Title and composer?
    – Aaron
    Commented Jun 25 at 2:53
  • 2
    @Aaron - Looks like the 1st movement of Beethoven's Piano Sonata No. 12 in A Flat Major.
    – Dekkadeci
    Commented Jun 25 at 7:04

1 Answer 1

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vi  viio7  I  CTo  V

CT = "Common Tone". Common-tone diminished chords like this one serve as a decoration or prolongation of some central chord. In this case, Eb is the common tone bridging I to V through a diminished triad.

For more on common-tone chords, see Understanding function of diminished chord in Paganini's 4th caprice and linked posts.

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