Harmonic Analysis Extra Quality: Schubert Impromptu Op 90 No 2

Though technically prepared as if it were in C-flat Major (the flattened submediant of E-flat), it is enharmonically written in B minor , a distant and striking key choice. Phrase Structure:

How do we get from E-flat major to B minor? The distance is a (E-flat to A) followed by a diminished fifth to B. In classical theory, this is a brutal, Neapolitan-like leap. But Schubert bridges it with a single, magical chord: the E-flat diminished seventh at the end of bar 54, which resolves enharmonically to the dominant of B minor (F-sharp major) in bar 55. schubert impromptu op 90 no 2 harmonic analysis