This is the opening from a "moving painting" collaboration between Nathan Currier and artist Suzan Woodruff. Woodruff was filmed while working on her painting Visitation. Currier then created a film sequence and "choreographed" a key part of his Gaian Variations with it.
The sonata, subtitled A Sonata for Mozart's Secret Society, after Mozart's plan to start a society called the Grotto, suggests the Enlightenment roots of our current understanding, and misunderstanding, of Nature.
This is the fourth movement of the sonata, in which a minuet and a dirge sound together throughout the movement, in a complex emotional and textural counterpoint.
From a recording on the Chandos label, this is the first movement of a trio for flute, viola and harp.