Harmonic Analysis of Schubert’s Impromptu in E-flat Major, Op. 90, No. 2 Franz Schubert’s Impromptu in E-flat Major, Op. 90, No. 2

The middle section provides a stark, "stormy" contrast to the lyrical opening. Key Relationship:

Suddenly, we are in C major . Why C major? In the context of B minor, C major is the flattened second degree (the Neapolitan chord). But Schubert doesn’t just use it as a single chord; he modulates to it, giving it a perfect authentic cadence (F to C). This is a classic Schubertian “thirds” relationship: B minor to C major is a half-step shift, which sounds jarring yet natural.

The piece opens piano with a single-note pickup in the right hand, establishing E-flat major. The harmony in the first few measures is remarkably static, balancing on an implied Tonic (

The Impromptu is structured in a ternary (A–B–A) form with a substantial Coda. However, Schubert subverts traditional Classical expectations by ending the piece not in the bright tonic home key of E-flat major, but in its parallel minor, E-flat minor.

Section A is driven by continuous eighth-note triplets in the right hand over a simple, dance-like accompaniment in the left hand. Despite the rapid surface motion, the underlying harmonic rhythm is slow and deliberately structured.

The harmonic rhythm slows down. Schubert loops a series of cadential progressions (

The B section is set in the distant key of B minor (enharmonically related to C-flat minor). It utilizes heavy accents on the second beat to create a waltz feel. A notable progression here includes a modulation to F-sharp minor via a of V chord (measure 97).

Franz Schubert’s Impromptu in E-flat major, Op. 90, No. 2 (D. 899) is a masterpiece of the late Classical and early Romantic piano repertoire. While it initially presents itself as a light, fluid Etude-like work dominated by rapid triplet scale passages, a deeper structural and harmonic analysis reveals a complex narrative.

The most striking harmonic event is the transition to the "B" section. Schubert moves from the bright E-flat major to a dark, driving .

The Impromptu Op. 90, No. 2 follows a modified sonata form, with an exposition, development, and recapitulation. The piece begins with a gentle, lilting melody in the right hand, accompanied by a subtle arpeggio pattern in the left hand. The exposition presents two main themes, which are later transformed and elaborated in the development section.

Significant dramatic climaxes (e.g., mm. 114–115) utilize Neapolitan cadences , emphasizing the tragic weight of the minor key. Significant Chord Progressions

(flat submediant of E♭ major is C♭, but E major is enharmonic to F♭—a rare III♭ relation).