Prelude in Cm Opus 28 n ° 20 – 1838
This is the twentieth of the twenty-four Preludes defining op 28, each one written in a different tone following the cycle of fifths, each main tone followed by its relative minor. They were composed between 1835 and 1839, mostly on the island of Majorca where Frédéric Chopin had spent the winter with George Sand and her children, to escape the rainy weather of Paris which worsened his chronic tuberculosis. Inspired by the preludes of the Well-Tempered Clavier by Jean-Sébastien Bach, they inspire in turn the Preludes of Alexandre Scriabine, those of Claude Debussy, and Sergei Rachmaninov.

Nocturne in B maj N ° 1 op 38.
This nocturnal written in 1837 relates the question and secret impulses about the relationship between George Sand and Frédéric Chopin. This jazz version played as a ballad reserves the improvised part on the double bass, first in pizzicato and then on the bow.

This nocturnal was composed for Ludwika Chopin with the dedication: “To my sister Ludwika as an exercise before starting to study my second concerto ”. It was published twenty-six years after the composer’s death, under the title Reminiscence. He is known to have saved the life of the pianist Natalia Karp, who was spared after playing it in front of the nazi officer Amon Goeth, commander of the concentration camp where she was detained.