I have always loved this piece, and after performing it myself many times, I have come to a more or less definitive version of the saxophone part. It is not so easy to create a sensible plan for the registers in which to play, with full understanding of the composition and the interplay between the voices of the piano and the violin. Every section needed to be evaluated – there is no general guideline.
In order to give insight in my choices I have specified the original (violin) version with brackets. This gives the performer the opportunity to make individual choices based on their own skills and expertise. I have used an urtext edition as source.