The opening establishes E-flat Major, though often with a chromatic "serpentine" scale that suggests restlessness.
The most striking harmonic event is the transition to the "B" section. Schubert moves from the bright E-flat major to a dark, driving . schubert impromptu op 90 no 2 harmonic analysis
The Impromptu is cast in a large with a substantial Coda . However, Schubert subverts the traditional expectations of this form through his choice of keys and the tragic trajectory of the ending. Primary Key Character / Material Section A mm. 1–82 E-flat Major Fluid, perpetual motion triplets; elegant and scalar. Section B mm. 83–168 B-minor (vi-flat) Highly rhythmic, syncopated, dramatic, and rustic. Section A′ mm. 169–250 E-flat Major Exact repetition of the opening material. Coda mm. 251–283 E-flat Minor Dark, aggressive transformation of Section B material. 2. Section A: Diatonic Elegance and Chromatic Inflections The opening establishes E-flat Major, though often with