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sine wave thru soft synced sinewave all the way to the
phase distortion.
Track & Hold Modulation
(OSC OUT, MODE connected to "+")
This is a not so common synthesis method. The main sine
wave oscillator is going thru a comparator which turns it into
a variable pulse width waveform which is gating a track &
hold circuit.
The second oscillator is being fed thru the track & hold
which means that when the pulse of the main oscillator is
high the signal passes and when it becomes low it holds
static voltage.
The threshold (WAVESHAPE) on the comparator sets the
pulse width and therefore the amount of the modulation
while the PITCH and TIMBRE set the frequencies of the
oscillators.
Formant synthesis
(SECONDARY OSC OUT, MODE connected to "+")
This mode is inspired by the Helmholz Synthesizer (made
in 1905) which was an acoustic synthesizer based on
several pitchforks tuned as several harmonic multiples of a
fundamental frequency that have been amplified by
adjusting a mechanical shutter of an acoustic resonator of
corresponding frequency.
Such a device could emulate vowel sounds made up by
sine waves of di erent harmonic frequencies mixed
together.
On Kastle the WAVESHAPE knob selects di erent
combinations of harmonic frequencies and their
proportions built up on the secondary oscillator.
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