Schubert Impromptu Op 90 No 2 Harmonic Analysis ((install)) < TRUSTED >

This piece is a study in harmonic deception. While written in E-flat major, it immediately subverts the tonic and uses a relentless triplet motor to create a sense of flowing, anxious energy rather than stable repose.

Summary for Study

• Home Key: E-flat Major.
• Primary Modulation: Moves to C minor (vi) and B-flat Major (V).
• Development: Utilizes the Neapolitan (F-flat) and Circle of Fifths sequences.
• Trio: Shifts to Parallel Minor (E-flat Minor).

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. schubert impromptu op 90 no 2 harmonic analysis

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

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

(D. 899) is a staple of the Romantic piano repertoire, renowned for its "moto perpetuo" triplet scales and dramatic tonal shifts. While it begins with a light, shimmering character, a harmonic analysis reveals a darker undercurrent that eventually consumes the piece, leading to a tragic conclusion in the parallel minor key. Structural Overview The piece follows a compound ternary (A–B–A) form with a distinct Section A (E-flat Major): Characterized by rapid, scale-based triplet passages. Section B (B Minor/Trio):

A starkly contrasting "bohemian waltz" marked by heavy accents and wide-spaced octaves. Section A' (Return to E-flat Major): A restatement of the opening material. Coda (E-flat Minor):

A final, accelerating section that shifts permanently into the minor mode. Harmonic Progression and Key Relationships The Ambiguity of Section A Although ostensibly in E-flat Major , Section A frequently veers into the parallel minor ( E-flat Minor

). The harmonic rhythm is relatively slow, often tethered by a repetitive bass line that grounds the swirling right-hand triplets. A key transitional moment occurs as the music moves through a sequence of secondary dominants to reach a climax, followed by a shift to pianissimo in E-flat minor. The Remote Trio (Section B) This piece is a study in harmonic deception

The Trio section is notable for its distant harmonic relationship, modulating from E-flat to

(the enharmonic equivalent of C-flat minor). This section consists of five four-bar phrases that establish B minor before modulating to F-sharp minor Key Modulations: The transition to F-sharp minor is achieved through a chord of V (G# diminished 7th). Counterpoint:

Schubert employs passing tones and neighbor tones (e.g., F#–G–F#) within the inner voices to add melodic interest to the block chords. The Coda: Final Resolution to Minor

This piece is a masterpiece of Schubert’s harmonic language, characterized by modal mixture (borrowed chords), seamless modulations, and the juxtaposition of major and minor tonalities.

C. Equality of Major and Minor

Schubert does not treat minor keys as tension that needs to be resolved to a Major key. In this piece, E-flat Major and E-flat Minor are treated as equals. The Trio does not "resolve" into the A section; it merely contrasts with it. The Minor mode is viewed as a valid color, not just a functional dissonance.

Part IV: The Return (Section A’) and the Tragic Coda

The return (bar 115) is almost identical to the opening, but perceived differently. After the harmonic chaos of B minor, the simple I-V-I of E-flat major now sounds heroic, even tragic—like a survivor smiling after a storm. Home Key: E-flat Major

However, Schubert adds one final disquieting touch. In the coda (bars 158-169), just as we expect a triumphant close, the left hand plays a series of Neapolitan sixth chords (F-flat major – wait, that’s an F-flat, A-flat, C-flat? Yes, spelled enharmonically as E-natural, A-flat, C-flat? Let's be clear: it's a D-flat major chord in second inversion).

Better: He uses the Neapolitan of the dominant (an A-flat minor chord? Let's check the score).

Correction for accuracy: In bar 162, Schubert slips in a German Augmented 6th chord on A-flat (A-flat, C, E-flat, F-sharp) that resolves deceptively not to the dominant (B-flat), but to a F-flat major triad (spelled F-flat, A-flat, C-flat). This is an astonishingly remote chord in E-flat major (the flat submediant of the subdominant? It doesn't matter—it’s pure color). This final harmonic gasp reminds us that even in victory, Schubert cannot forget the shadows.

Overall Structural Overview (Ternary Form)

• A Section (Triplet Figuration): E-flat major, but harmonically unstable, moving rapidly through distant keys.
• B Section (Trio/Chorale): E major (enharmonic parallel minor of the submediant? Actually, a shocking mediant shift).
• A’ Section (Da Capo): Returns to E-flat major, but the coda re-asserts the destabilizing harmonies of the A section.

5. Key Harmonic Concepts for Analysis

If you are writing a paper or studying the score, focus on these three "Schubertian" techniques:

2. Section A (Bars 1–60) – E-flat major, then destabilized

B Section (Bars 65–120): B Minor

This is a dramatic break: From E-flat major (bright) to B minor (dark, five flats away). The modulation is enharmonic and abrupt:

Bar 64 ends on Eb major. Bar 65: B minor. Schubert pivots by treating Eb as D# (enharmonic). D# is the leading tone of E minor, but he lands on B minor (relative of D major). More simply: Eb = D# → leads to E minor? No, he lands on B minor via a deceptive enharmonic respelling of the dominant 7th of Eb as a German 6th in B minor. The effect is a shock.

Harmony of B Section:

• Bars 65–80: Firmly in B minor. The bass descends: i (Bm) → VII (A) → VI (G) → V (F#). Typical Baroque/Classical descending tetrachord, but stormy and agitated.
• Bars 81–88: Modulates to D major (relative major of Bm) – a brief respite. Then back to Bm.
• Bars 97–104: Chromatic rise through B minor to C# minor? No – he touches E minor (bar 99) then F# minor (bar 101).
• Bars 105–112: Climax on a French augmented 6th in B minor (E#-G-Bb? Let’s spell: French+6 = A#-C#-E#-G? Actually standard: In Bm, Fr+6 = E#-G-A#-C#? Better: The chord is spelled E#-G-A#-C# = Fr+6 resolving to F# (V)). This high-tension chord resolves to the dominant (F#), then back to i.
• Bars 113–120: Virtuosic descending passage, ending on V of B minor (F# major).

The B section ends on a half-cadence (V of Bm), which resolves back to the A’ section by enharmonic reinterpretation: The F# chord is respelled as Gb major, which is the Neapolitan of Eb? No – it’s just a tritone substitution enharmonic: F# (V of Bm) is treated as Gb, and then Gb slides down to F (Eb’s V) – but Schubert simply crashes back to Eb major at bar 121 without preparation. Another shocking juxtaposition.

Bridge back (bars 117–124):

• E major → C major (common-tone modulation: E and C share E♮ as third of C major? No—rather, Schubert uses C major as Neapolitan of B minor, but bypasses—just a surprising direct shift).
• Then C major → F minor → B♭7 → Return to A section key (E♭).