The timbres were constructed by interpolation between archetypes that were designed empirically. The major features of this tonal landscape are controlled by notes played on a MIDI wind controller and by the time delay between those notes. The single notes from the soloist are passed through the Macintosh and translated into a multi-voice texture. Imagine that we are touching peaks and valleys on a blank canvas and that the mountains appear automatically. More specifically, each note from the soloist is recorded by arrival time, pitch, and key velocity.
Adjacent notes provide the endpoints of lines that represent the slopes of the mountain.
The fractal algorithm constructs an accompaniment gesture that traces the space between a pair of points. A three-dimensional interpolation takes place in time, pitch, and loudness. Some special rules of interaction between the soloist and accompaniment algorithm were found useful. These extreme time periods are ignored by the fractal algorithm. The ranges become lines in a monumental contrapuntal structure.