Based on reprise form. The central section is characterised by the cessation of movement and effusive lyricism. However, the outer parts, though full of movement, weave long-breathed arabesques with tranquility resulting from rocking uniformity and abstract dance. The sound world of the impromptus sound is "bright", subject to euphony and beautiful rhythm.

Critical source-edition edited by Jan Ekier and Paweł Kamiński based on manuscripts, copies approved by Chopin himself, and first edition...