Over the course of its four or five minutes in performance, the performer has the opportunity to demonstrate facility in a large number of different musical textures and techniques.
The opening exposes two principal ideas, a ground consisting of mostly repeated notes and a memorable and active countermelody.
After the two have exchanged roles, a brief cadential passage punctuated by dotted rhythms ensues, and the foundations of the fantasia have been laid.
Much of the remaining music follows or adapts these basic musical materials: we encounter passages in which a two-voiced texture elaborates an ornamented line that repeats some notes, and passages involving a more imitative texture following the first contrapuntal melody, and passages that riff upon the dotted-note motif and its rhythmic interest.
The conclusion of this lengthy fantasia shifts rhythmic meters twice and brings the virtuosic complexity of the inner voices to a peak of difficulty.