This passage does not introduce new techniques, but uses some trick manipulation of volume that are explained at the end of the section.

This passage sounds much busier because I increased the space between primary notes from three beats to two. I divided the octaves into four approximate ranges. The lowest has randomized pitches lasting one beat, which begin on beats that don't have a "primary note." There is no parallel in Beethoven's music at this point.

The next higher range is meant to mirror the melody in this part of the audio file, which is slightly lower than it was before. The highest range is connected to this, because Beethoven wrote some parts of the melody much higher than the other parts.

The second-highest range reflects the quickly-moving accompaniment part in the upper register of the piano.

Sorting out the volumes for this passage posed a small challenge, because of the much greater number of notes than in previous passages. Thankfully, the parts are mostly well-separated from each other in the matrix editor. I was able to use click-and-drag selection to select each range separately, and adjust its volume using both the "Resize MIDI" tool and Control-drag in the volume adjustment space at the bottom of the matrix editor window.

My sustained-note flourish at the end of this passage was a feeble attempt to establish A Major tonality in the highest register that I used.