Cees Nieuwenhuizen composed the first movement of his flute sonata in 1981. It would stay a one-movement piece up until 2012, when the second and third movement were added. Unlike his other works from the period 1980/85, this is a tonal composition with a first and a second theme in the first movement (Allegro), as is common in classical works. However, the composer did not avoid dissonances on strong, accented beats and the work also has free tonal moments. For example, Cees plays with major and minor in the first theme of the first movement and also dissonant harmonies are to be found in the transitional measures that lead back to the first theme. The first movement is in B Flat minor, while the second movement (Andante maestoso) is in the far different key of E major. This part is cast in a song form with a cadenza-like melody in the flute at an ostinato accompaniment of the piano, with Lydian elements.
The middle part consists of free elements and a cadenza for the flute.
The last part is a rondo, again in B Flat minor (Molto allegro).
This movement is always interrupted by cadenza-like moments for flute, which throws the rondo ‘feeling’ in a playful way. Eventually the coda appears in the redeeming major key and closes off in B Flat major.