Commissioned by Feldmusik Baar in Unterageri, Switzerland. The work is in the form of a single movement in a sprightly, vigorous tempo throughout, and built from three contrasting themes, with the music evolving (hence its title) from the interplay of these three themes, one brash and powerful, the second gay and lilting, and the third lyrical and reflective. The combination of, and contrasts between, these three motivic elements are treated with all of the resources of the modern, fully integrated wind orches-tra to create a brilliant texture.
