The Dewanatron Triple Slice VCO harmonic metamorphosis module generates a highly
stable 1v/octave sine-based waveform that ranges from .5hz thru 16khz.
The initial sine wave passes thru 3 successive slice stages. The end result is
a continuously undulating waveform, which yields an ever-changing spectrum of
emerging and receding harmonics.
Harmonics are generated by "slicing" a waveform, in which an absolute value
function with a variable zero point reverses the polarity and thus reflects the
portion of the waveform below it. As this reflecting line passes thru the
waveform along the voltage (vertical) axis, various harmonics are generated.
The three slice stages are controlled by 3 independent LFOs.
The first slice stage is controlled by either an internal oscillator or the
external oscillator input. The frequencies of the LFOs driving the second and
third slice stages are derived from this initial LFO signal, and their
frequencies relative to each other are adjusted with the "skew" control. The
"mix" output sums these three outputs with the original sine wave (these three
outputs are also available separately). The resulting final signal contains
multiple sets of cascading harmonics.