Prelude in E minor, Op. 28 No. 4

Why this piece

Bach’s C-major prelude presents harmony through a flowing pattern; Chopin’s E-minor prelude presents it through a slow, shifting chordal texture. The contrasting approach reveals how individual inner voices and chromatic movement create emotional tension. It also makes a good first encounter with Romantic interpretive choices.

Musical profile

• Key / tonal centre: E minor
• Meter: 2/2 (alla breve)
• Suggested version: Original score.

Representative harmony

A slowly chromatic chain of changing left-hand chords: E-minor tonic, unstable B-dominant colors and passing diminished/half-diminished harmonies.

Practice loop

The real prelude is a slow chromatic LH chain; this map is a coarse tonic–dominant frame for orientation, not a reduction of the score.

What to listen for

No short pop progression adequately describes this prelude. Track each downward semitone in an inner voice and the eventual B7→Em resolution.

What to learn

Practice the left-hand chord changes separately, following how specific pitches descend by semitone. Keep the melody long and connected even as the accompaniment changes below it. Use rubato sparingly, understanding where a phrase can stretch and where momentum must be preserved. Aim for a controlled rise and fall rather than constant melancholy at one volume.

Practice checkpoint

Produce a clear dynamic arc through a complete phrase while keeping the inner harmonic movement audible and the melody unbroken.

Diagnostic drill · E23 — Chromatic descent without losing the melody

Target: Chromatic voice leading, restraint and tension.
Drill key / meter: E minor · Slow, broad two-beat feel

Use this only when it addresses the current bottleneck. Skip it when the skill is already ready.

Steps

1. RH sustains an E4 melody note (or repeats it gently as necessary) while a single LH inner voice moves downward: E3–D♯3–D3–C♯3–C3–B2, each for two slow beats.
2. Add one quiet supporting note in LH, such as B3, if comfortable; listen to how the interval above the moving voice changes. This is a listening exercise, not a harmonization of the Chopin score.
3. Repeat, gradually reducing volume toward the final B. Keep every chromatic move deliberate, with no accidental accents.

Ear task: Sing the descending semitone steps before playing them.

Transfer: Identify an actual descending inner voice in the prelude and mark it in the score.

Drill checkpoint: Shape the descent with a calm upper melody and without relying on pedal to hide changes.