The Prelude (Adagio, completed February 7, 1951) sounds as if it were a dialogue between two individuals. A solemn melody in octaves alternates with an improvisatory-sounding melody played in the high register, creating a clear contrast in terms of range and character.

The subject of the Fugue (completed February 14, 1951) shares its first four notes with the opening subject of the Prelude. However, the character of the Fugue subject does not inherit the somberness of the Prelude, and despite being in a minor key, the piece as a whole possesses a gentle sound. The alternation of 4/4 and 3/2 meters observed in the interlude, combined with the liveliness of the melody played in that section, brings a certain sense of exhilaration to the musical idea.