concept / construction:
The same 16-note melody (in octatonic half/whole scale) is repeated 14 times. The first 9 times are in dialogue form: the 16 notes are played in order by the 2½ instruments (where order is determined only by start time of a note), with the instruments taking turns in playing a note or short sequence. After that, the 2½ instruments each play the whole melody (i.e. all 16 notes) together 3 times (but at different rhythms). The final part is two repetitions in dialogue form again. Although the same melody is repeated 14 times, there is no repetition in rhythm and structure.