The "A" section is built on a non-stop stream of triplets. Harmonically, it is less about complex chords and more about .
A hallmark of Schubert’s style is "modal mixture." Early in the first section, he pivots briefly to G-flat major (the bIII). This creates a momentary "shimmer" before returning to the home key, signaling that the piece isn't as harmonically stable as it first seems. Section B: The B-Minor Shift (The Enharmonic Pivot) schubert impromptu op 90 no 2 harmonic analysis
The frequent interplay between major and minor modes. The "A" section is built on a non-stop stream of triplets
The triplet scales return, but they are now shadowed by the flattened 3rd (G-flat), 6th (C-flat), and 7th (D-flat). This creates a momentary "shimmer" before returning to
Schubert begins with a simple I - V7 - I progression in E-flat major. However, he quickly introduces chromatic passing tones within the scales to blur the lines of the key.
This section utilizes heavy accents and syncopation. The harmony moves through a series of Secondary Dominants , pushing the tension until it reaches a climax that eventually winds back down to the E-flat major scales of the "A" section. The Coda: The Final Transformation