Schubert's Impromptu Op. 90 No. 2 in E-flat Major (D. 899) is a swift moto perpetuo structured in a ternary (A-B-A') design
. It is technically demanding, often rated at a high difficulty level (e.g., Grade 10 on the RCM syllabus Sectional Analysis Section A (E-flat Major): Structure:
This section itself follows a compound ternary form (a-b-a'). It opens with rapid, scale-based triplets in E-flat major. Modulation:
A significant early transition occurs from E-flat major to its parallel minor (E-flat minor) , marked by a dynamic shift to pianissimo Harmonic Features:
The melody often uses secondary dominants for climactic sequences and "German sixth" chords (at bars 76 and 81) before closing the section. Section B / Trio (B Minor): The piece modulates abruptly to
(the enharmonic equivalent of C-flat minor). This provides a stark, "all'ongarese" (Hungarian style) contrast to the fluid A section. Structure: It consists of multiple four-bar phrases. Harmonic Path:
It establishes the tonic (B minor) and eventually modulates to its dominant, F-sharp minor . Some analysts interpret the internal harmony as using a iv chord with an added 6th i v raised to the a d d 6 power ), a signature Schubertian technique. Section A' and Coda:
The original A section returns with its characteristic swirling triplets. Conclusion: The piece ends with a
that is a variant of the B section. Unusually for a work that begins in a major key, it concludes forcefully in E-flat minor , subverting standard classical expectations. Summary of Harmonic Structure Primary Key Key Features E-flat Major Rapid triplets; moves into parallel E-flat minor.
Enharmonic shift; waltz-like rhythm; modulates to F-sharp minor. E-flat Major Return of initial theme. E-flat Minor Violent, minor-key ending. chord progressions or a performance guide for these sections? Impromptu in Eb major D 899/0p. 90 No 2 - Piano Syllabus
This piece is a dazzling, perpetual-motion study with a deceptively simple right-hand melody over a relentless triplets accompaniment. The harmonic structure is a masterclass in Schubert’s signature techniques: rapid tonal shifts, third-related modulations, and the Neapolitan sixth.
Schubert’s harmonic language in Op. 90, No. 2 is not about functional prolongation but tonal surprise. The A section repeatedly destabilizes E♭ major through:
The B section’s shift to E major is radical—not a traditional relative or parallel key, but a half-step displacement of the tonic, prefiguring late Romantic and Impressionist harmonic practices.
This is where the harmonic analysis becomes fascinating. The B section acts as a development, but it is driven almost entirely by sequential modulation. schubert impromptu op 90 no 2 harmonic analysis
The Neapolitan Shift (Measure 41):
The Circle of Fifths Sequence:
The analysis is best broken down by its large-scale structure:
Before diving into specific chords, we must understand the layout. The piece is structured as a Rounded Binary Form (A-B-A’) , though it also carries the DNA of a miniature sonata form without a development section.
The harmonic genius lies not in the return to the tonic, but in the way Schubert leaves it and the path he takes to return.
This Impromptu is a textbook example of how Schubert used harmony to create a "psychological" narrative—wandering through keys not just to fit a form, but to evoke a sense of longing and searching.
Franz Schubert's Impromptu Op. 90 No. 2 in E-flat Major is a masterclass in early Romantic formal and harmonic tension, famously starting in a bright major key and ending in a tragic minor key. 1. Formal Structure
The piece follows a clear ternary form (A–B–A’) with an extensive coda.
A Section (mm. 1–82): Characterized by swirling, etude-like triplets in the right hand.
B Section / Trio (mm. 83–168): A "bohemian waltz" in B minor (the enharmonic flat-sixth of the original key, or
A’ Section (mm. 169–250): A return of the E-flat Major triplets.
Coda (mm. 251–end): A high-energy accelerando that shifts the tonality permanently to E-flat Minor. 2. Harmonic Highlights Traversing Schubert's Opus 90 Impromptus
Franz Schubert’s Impromptu Op. 90 No. 2 in E-flat Major (D. 899) is a staple of early Romantic piano literature, characterized by its perpetual triplet motion and dramatic shifts between major and minor modes. Formal Structure Schubert's Impromptu Op
The piece is typically analyzed in Compound Ternary Form (A–B–A’), with a distinct coda:
Section A (mm. 1–82): Built in a nested ternary form (a–b–a).
a (mm. 1–25): Establishing the home key of E-flat Major with scale-based triplets.
b (mm. 26–51): Moves to E-flat Minor, introducing a darker, more lyrical tone.
a' (mm. 52–82): Returns to the home key before transitioning to the Trio.
Section B / Trio (mm. 83–158): Set in B Minor, this section contrasts the flowing triplets with a "rough, bohemian waltz" feel, featuring off-beat accents.
Section A’ (mm. 159–242): A varied return of the initial E-flat Major section.
Coda (mm. 243–end): Reasserts themes from the Trio but, unusually for a piece starting in a major key, concludes forcefully in E-flat Minor. Harmonic Analysis
The harmonic language is defined by Schubert's signature use of chromaticism and modal mixture. Key Areas and Modulations
The Tonic (E-flat Major): The opening establishes E-flat Major, though often with a chromatic "serpentine" scale that suggests restlessness.
The Trio (B Minor / Enharmonic C-flat): The shift to B Minor (m. 83) is harmonically striking. It is prepared as C-flat Major but enharmonically transformed to B Minor for ease of reading. This section modulates frequently, specifically moving from B Minor to its dominant, F-sharp Minor (mm. 98–102).
Neapolitan Relations: Significant dramatic climaxes (e.g., mm. 114–115) utilize Neapolitan cadences, emphasizing the tragic weight of the minor key. Significant Chord Progressions
Establishment of Key: The Trio uses clear harmonic cycles to anchor the new tonality, such as the i–bII6–V#–i progression in F-sharp minor. Chromatic mediants (E major, C♭ major)
Harmonic Ambivalence: Schubert frequently uses rapid interchanges between major and minor versions of the same motive, creating a sense of "poetic tension".
The Final Cadence: The piece ends with a descent into E-flat Minor, finalized by two forceful chords, rejecting the "happy ending" expected of the opening E-flat Major key. Thematic & Rhythmic Analysis
Triple vs. Duple: While the A section is dominated by triplets, the Trio introduces a waltz-like rhythm where the triplet often falls on beat two, adding a "stamping" accent.
Etude-like Texture: The A section functions similarly to an etude, requiring great wrist flexibility for the continuous scalic figures. AI responses may include mistakes. Learn more Schubert's Impromptu Op. 90 No. 2 Analysis | PDF - Scribd
The A section is not static; it moves from tonic through a chain of descending thirds.
Bar 1: Opens with a clear I (Eb major) arpeggiated in the right hand over a dominant pedal (Bb in left hand – V chord root).
Bars 2–4: Moves to vi (C minor) via a common-tone modulation (Eb = third of Cm). Schubert obscures the harmony with chromatic inner voices.
Bars 5–7: Shifts to iv (Ab major) – another third relation (C minor to Ab major is a descending major third). This is Schubert’s “romantic” third progression.
Bars 8–10: Arrives at ii (F minor) – a standard diatonic chord, but approached by the unusual Ab major, creating a smooth chromatic descent: Eb – Cm – Ab – Fm.
Bars 11–16: V (Bb major) dominant preparation, but harmonized with chromatic passing chords (e.g., German augmented 6th in bar 14: Ab-C-Eb-F# resolving to Bb). This Ger+6 is a hallmark of Schubert’s rich harmony.
Bars 17–32: Repeat of the above harmonic pattern (I – vi – iv – ii – V – I).
Bars 33–48: The melody rises, and harmony moves to III (G major) – another third relation (from Eb). This is a false dawn. Schubert then slips through G minor (bar 39) and back to V (Bb) by bar 48.
Bars 49–64: Final cadence in Eb major. Notice the brief touch of bII (Fb major = E major? No – it’s a Neapolitan in Eb?) Wait – careful: At bar 55, there is a sudden F-flat major chord (spelled Fb-Ab-Cb). This is the Neapolitan of Eb (N = Fb major). But since Fb is enharmonic to E, it sounds like an E major chord crashing in – an abrupt, shocking color. It resolves deceptively through Cb (enharmonic to B) to Bb7 (V7) and back to I.
Summary of A Section Key Centers: Eb → Cm → Ab → Fm → (Eb) → G → Eb.