Korg NAUTILUS Series, Parameter Manual, Page: 297 / 961

PROGRAM > PolysixEX: Main 4–1: Patch Panel
287
PROGRAM > PolysixEX: Main
4–1: Patch Panel
4–1a: VCO
VIBRATO INT [0.00…10.00]
Moving the joystick “up” from the center detent position,
away from yourself, produces the JS+Y controller (MIDI
CC#1). On the PolysixEX, JS+Y normally controls
VIBRATO –the amount of the MG applied to VCO pitch.
VIBRATO INT controls the intensity of this modulation, up
to +/- 2 semitones. To disable JS+Y’s control of VIBRATO ,
set this to 0.00 .
Note that this is optimized for fairly small amounts of pitch
modulation. For more dramatic effects, set the MG’s
MODE
to VCO , and adjust the depth via the MG’s LEVEL knob.
Alternatively, you can modulate TRANSPOSE or TUNE
via AMS.
VIBRATO INT is scaled by MIDI CC#77.
OCTAVE [16', 8', 4']
This sets the VCO’s coarse tuning, in octaves.
WAVEFORM [SAW, PW, PWM]
This selects the VCO’s waveform.
SAW produces a sawtooth wave–the traditional buzzy
analog synth sound.
PW produces square and pulse waveforms; for more
information, see “PW/PWM,” below.
PWM is similar to PW, but uses a dedicated LFO to
modulate the waveform. The speed of the LFO is controlled
by “PWM SPEED,” below. The
PW/PWM setting
determines the maximum width.
PW/PWM [0.00…10.00]
When WAVEFORM is set to PW , this directly controls the
shape of the waveform.
When WAVEFORM is set to PWM , this controls the
maximum pulse width when being modulated by the
dedicated PWM LFO. When
PW/PWM is set to 0.00 , the
LFO will have no effect.
More on Pulse Width
Pulse waveforms are simple, rectangular shapes. The Pulse
Width sets the percentage of the waveform spent in the “up”
position. A few examples are shown in the diagram below.
Note that a square wave is just a pulse wave with PW/PWM
set to
0.00 .
The width controls the timbre of the oscillator, from pure
and hollow at
0.00 (a square wave) to thin and reedy at
higher settings.
At the maximum setting of 10.00, the Pulse wave will be
very quiet, since the “pulse” goes up and then down again
almost instantly.
The real magic of the pulse wave comes when you modulate
the width, using either AMS or the dedicated PWM LFO.
With AMS, try using a medium-speed triangle LFO, or a
sweeping EG.
Pulse waveform at different widths
4–1PMC
4–1e 4–1f
4–1a
4–1b
4–1c
4–1d
4–1i
4–1g
4–1h
Pulse Width = 0.00
Pulse Width = 9.00
Pulse Width = 5.00