Duo [processo#2]

audiovisual étude - Italy, 2015
two sinewaves, vectorscope
the combination of two compound tones, under the proper conditions, can cause two particular phenomena. firstly, when the two tones have slightly different frequency beats phenomenon occurs, resulting in a sound whose amplitude is periodically modulated at a speed equal to the difference between the two frequencies. secondly, when this difference is too high to produce beats, combinational tones occur. these are additional tones, created in our auditory system, which frequencies are equal to the difference and the sum of the frequencies of the original tones.
Duo is composed by two sine waves whose frequencies slowly move away, until one is the double of the other. during this process, the wave's superposition produce acoustic interferences and sound illusions, caused by beats and resultant tones, adding more components to the composition than what the composer really generates. the structure of Due is somehow composed in our brain by the sound itself.

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[processi] is a series of processes which explore the nature of elementary sound entities. it started as observation of sound behaviors with an experimental approach focused on perception of wave interference, superposition, phase in uence, resonance and other acoustic phenomena. during these listening sessions I got more and more fascinated by these processes so that I started to think about it as a series of compositions which structure and gestures were slowly revealed within my brain by the sound itself.
these processes are generated by a computer so that time is not a fixed parameter and different versions (shorter of longer) of the same process can exist.

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[The following version runs in real time on the webpage using flocking.js (by Colin Clark) and webaudio api. Click on the above picture to launch the page.]