Description: After my first experiences in musique concrète, and even more so, when I started using the computer for music composition, I wanted to be able to compose the sound material , as I composed the structures when I wrote "notes" for instrumentalists. Our first researches, from 1976 (by means of a microprocessor that we had procured for ourselves), were done in this direction: to put the sound matter in memory and to fragment it so that it became "reflowable". The microprocessor of this era providing little computational power, it was necessary to imagine sound-efficient methods, but inexpensive in calculation - and we then formulated and exploited the method of "zero crossing". Indeed, by sharing the sound in small isolated waveforms, each having the property to start and end on the zero axis (energy equal to 0 volts, corresponding to the rest position of the speaker's diaphragm) ), it is possible to glue these shapes together in any order (so to compose from a given set of elements) without losing too much of the sound quality (spectral content) of each element.
Creator: Boesch, Rainer 1938-2014
Partner: UNT Music Library