Four Commentaries I – Rising, Falling, Hovering

The extract above shows very clearly how the title of this commentary
Rising, Falling, Hovering is used as a musical device. Algorithmic generators were devised for this composition to turn melodic phrases into evolving sequences that displayed tendencies to go up, down, up and down, down and up, and to meander.
Sometimes the result is very straightforward (as in bar 23-4). On other occasions this is not so, with variations of different lengths being added onto the directional transformation of the original phrases (as in bars 25-26).