International Computer Music Conference 2016 Papers Track

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Wavefolding: Modulation of Adjustable Symmetry in Sawtooth and Triangular Waveforms

The Pulse-Width Modulation (PWM) technique has been used to generate varying timbres of odd-harmonic spectra from early on in voltage controlled analog synthesis history. Methods for controlling the symmetry of a triangle-to-sawtooth wave have also been devised. This paper discusses a family of objects and techniques for piecewise waveform manipulation that may be modulated at audio rate, comparing the results with analog equivalents, and looking specifically at the implications of modulator phase and subtle deviations from integer carrier-to-modulator ratios, and fine deviations from these, on adjustable-symmetry sawtooth waves.


Edward Kelly     web site
Synchroma Audio Engineering
United Kingdom


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