Robert.
This music is a personal variation of the andante in F major of W.A. Mozart from the concerto for bassoon and orchestra K191 (2nd movement).
Preserving the orchestration, the movement of the voices and the rhythm of notes written by the Viennese composer I have made this variation replacing the F major tonality by a minor key signature. Some small changes in the notes and the resulting new harmonies give birth to this melancholic melody.