Jozef Malovec (1933-1998): Orthogenesis (1966-1967). Realized in the Experimental Studio of the Czechoslovak Radio, Bratislava.
In the composition only electronic sound sources are used. Resulting sounds were modified and filtered before as well as after the detailed decoupage, small sound structures being prepared from a random selection of high frequencies. With an \"infinite\" tape they were reproduced by an effect tape recorder with four magnetic heads, where the audio signal of every head was modified by a special adjustment of band pass filters or by various types of feedback. This elementary microstructural material underwent a further transformation through various degrees of reverberation, or by a continually changing reverberation. The composition has no definitive score; there exist only sketches of some of its parts, serving as an orientation at the process of montage and mixing. There exists also some schematic figures of the connecting of instruments for the producing of some of the microstructural material. The expanding and compressing of the time process in microstructures is incorporated in the whole. At some places it was produced by the effect tape recorder. By this device the musical form received dynamic pulsation and inner evolution.
While working on Orthogenesis I tried mainly to form a musically continuous process, whereby the means of new sound elements results in a counterpoint of various microstructures as well as various kinds of space. The stereophonic mixing gives the definitive form of the composition in the space of the audition.
By Jozef Malovec (fonte web).
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