This piece uses the same kind of notation as the late pieces by John Cage, with time frames indicating in which areas a note can begin and end. I like that kind of notation for a number of different reasons: First of all because it makes the piece more flexible and new each time; and secondly because it makes the performers more involved in the actual performance.
There are seven events in the piece that combines the three instruments in different ways.
The harmonic language is made up of chords using seconds and sevenths plus fourths and fifths. The instruments were choosen because they are very different in their way of producing sounds (blowing, bowing, beating), but at the same time they sound very much alike. Each instrument has got that soft, hollow timbre, and I really like that sound.
The idea about being the same and being different is also in the piece on another level: The instruments are combined in highly unusual ways, but at the same time the players are asked to make the chords sound as harmonious as possible.
So the piece is really about sound, and the combination of sounds in time.