Below the title, the challenges of this piece are stated as “Phrasé soutenu.-Recherche de la couleur” (Sustained Phrasing - Search for Color). As indicated by this challenge, indeed, each phrase is very long. The initial right-hand phrase, which might seem like a 4-bar phrase, is extended by another 2 bars through ties. For instance, if played on a flute, one would take a deep breath at the beginning and then play the melody while exhaling a thin, long stream of air. When playing on the piano, it is crucial to be mindful of such breathing. The other challenge, “Search for Color,” likely refers to considering the characteristics of the shifting harmonic colors. For example, the “A-E” double stop, typical of bar 1, is a perfect fifth (empty fifth), whereas the “G-D♯” double stop, typical of bar 5, is an augmented fifth, producing a more expansive sound than a perfect fifth. Listen carefully to the characteristics of these double stops, such as their expansion and contraction, and differences in brightness, like light and shadow. Furthermore, by focusing on the movement from one double stop to the next, you can observe a variety of expressive differences in the range of motion, whether large or small.