Here is the harmonic analysis of the first phrase. Measures 5 to 8 are explained in more detail below:
We'll start with the harmonic progression shown in the first system on the following image. With some chord substitutions, we'll arrive at Chopin's chords:
The bass note of the augmented sixth chord (B), would usually be placed as an inner or top voice. The following image shows the traditional disposition (a) and that used by Chopin (b):
The first four measures (9 to 12) of the second phrase are identical to those of the first. Follow some comments about the other measures.
|13 - 14||The progression in measure 13 is repeated one tone down in measures 14.|
|15||The G dominant chord in measure 14 leads to C minor. An augmented sixth chord of the C minor key is written as an Ab dominant chord and prepares the next section in Db.|
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