The one-sharp signature holds for all twenty-six measures. Secondary dominants colour the subdominant and the mediant, a Neapolitan inflection arrives in both halves, and every one of them resolves back inside E minor. No rival centre is ever established.
The second half opens with material identical to the first, down to the pitch. The correspondence breaks at the second beat of m. 14, and from there the two halves part company entirely — not repetition, but accumulation.
The piece's only forte, its highest note, its widest simultaneous span, and the lowest bass heard so far all arrive within a single measure. The climax is corroborated independently by every parameter in the score.
Unaccompanied anacrusis, then repeated chords beneath a near-static melody. The bass sinks a fifth by step. Closes short of full closure.
Reopens with the same material, diverges at m. 14, and accumulates toward the climax at m. 17. Ends in silence rather than cadence.
The repeated-chord texture is abandoned outright. Harmonic rhythm slows to three events. The only full closure in the piece.
Frédéric Chopin, 1810–1849.
From the set of twenty-four · published 1839.
26 measures · anacrusis opening
Three spans · one perfect authentic cadence
Unbroken from m. 1 · block chords in the coda
Annotated score and further Préludes from Op. 28 — in progress.
Analysis and study materials published as they appear.