I have been working on a method of synthesis whereby a three dimensional space can be described through the careful arrangement of destructive interference nodes between sound sources. I have been able to translate three dimensional shape definitions into csound scores which feeds a csound orchestra instument that has been constructed to anticipate the location of interference patterns of low frequency sound sources, given the relative postions of the speakers. Not only is the audio product pleasing and artistically valid, but one can actually visualise the reconstructed shape in space between the speakers by exposing the space to a suspended cloud such as smoke or dust. By blowing smoke for instance between the speakers as csound 'plays' the score, a vague but recognizable reproduction of the original input shape can be seen. What happens is that the places where destructive interference nodes effectively stop the air movement, the cloud particles become more visible than in those spaces where the sound is active, and moving the cloud particles more rapidly. The effect can be quite astonishing, and opens, I believe, a very important new avenue of compositional expression. Here is an example of one of the more successful images, a bust of Beethoven: http://tobiah.org/beethoven.html Tobiah