Korg NAUTILUS Series, Parameter Manual, Page: 298 / 961

EXi: PolysixEX
288
PWM SPEED [0.00…10.00]
The PolysixEX has an LFO dedicated to pulse width
modulation (PWM). This adjusts the speed of that LFO.
Note that this applies only when the
WAVEFORM is set to
PWM .
The dedicated PWM LFO is shared between all the
PolysixEX voices, similar to the Common LFO.
If you’d like more flexible PWM, including per-voice
modulation, you can use AMS to modulate the
PW/PWM
parameter directly.
SUB OSC [2OCT, 1OCT, OFF]
The VCO includes a sub-oscillator. You can set this to sound
either one or two octaves below the main oscillator, or turn it
off completely if desired.
2OCT : the sub-oscillator will sound at two octaves below
the main oscillator.
1OCT : the sub-oscillator will sound at one octave below the
main oscillator.
OFF : disables the sub-oscillator.
4–1b: MG (Modulation Generator)
The MG is shared between all PolysixEX voices, similar to
the Common LFO. For per-voice modulation, use
LFO1 or 2
instead.
The MG is available as an AMS source throughout the
PolysixEX, in two different versions:
MG is the unaltered
MG signal, and MG + Delay is at 0 until the programmed
DELAY time has elapsed.
TEMPO SYNC [Off, On]
Touch the text/LED area to turn TEMPO SYNC on and off.
On (LED lit): When TEMPO SYNC is On , the MG
synchronizes to the system tempo, as set by either the tempo
of program or MIDI Clock. The MG speed is controlled by
the combination of the
BASE NOTE and
FREQUENCY/TIMES parameters, below.
Off (LED dark): When TEMPO SYNC is Off , the
FREQUENCY/TIMES knob determines the speed of the
MG, and the BASE NOTE setting has no effect.
This parameter is not modulatable via AMS.
KEY SYNC [Off, On]
If this setting is ON , the phase is reset for the first note-on in
each legato phrase. Subsequent notes in a chord, or notes
played legato, do not cause the phase to be reset.
This parameter is not modulatable via AMS.
BASE NOTE [1/1…1/32]
When TEMPO SYNC is ON, this sets the basic speed of the
MG, relative to the system tempo. The values range from a
32nd note to a whole note, including triplets. This value is
then multiplied by the
FREQUENCY/TIMES knob, below.
When TEMPO SYNC is OFF , this parameter has no effect.
This parameter is not modulatable via AMS.
FREQUENCY/TIMES [0.00…10.00/16…1]
If TEMPO SYNC is OFF , this controls the frequency of the
MG.
If TEMPO SYNC is ON , this multiplies the length of the
BASE NOTE . For instance, if the BASE NOTE is set to a
sixteenth note, and Times is set to 3, the MG will cycle over
a dotted eighth note. Note that higher values mean a faster
MG.
DELAY [0.00…10.00]
Adjusts the time from note-on until the MG is heard.
Note that this affects only the routing selected by the MODE
parameter, below; the VIBRATO always uses the un-
delayed MG signal.
LEVEL [0.00…10.00]
Adjusts the depth of the effect produced by the MG.
MODE [VCA, VCF, VCO]
Selects whether the MG modulates the amplitude ( VCA ),
the filter cutoff ( VCF ), or the pitch ( VCO ).
4–1c: VCF
CUTOFF [0.00…10.00]
This controls the cutoff frequency of the 24dB lowpass filter.
Sounds above this frequency are removed, making the
timbre darker.
This is scaled by MIDI CC#74.
RESONANCE [0.00…10.00]
Resonance emphasizes the frequencies around the cutoff
frequency.
When this is set to 0 , there is no emphasis, and frequencies
beyond the cutoff will simply diminish smoothly.
At medium settings, the resonance will alter the timbre of the
filter, making it sound more nasal, or more extreme.
At very high settings, the resonance can be heard as a
separate, whistling pitch. Near the maximum setting, the
filter will self-oscillate.
RESONANCE is scaled by MIDI CC#7.
EG INTENSITY [–5.00…+5.00]
Specifies the depth and direction to which the EG will affect
the cutoff frequency.
This is scaled by MIDI CC#79.
KBD TRACK [0.0…150.0]
Adjusts the depth to which the cutoff frequency will change
according to the note number, centered at C3.
With a setting of 100, the change in cutoff frequency will be
proportionate to the change in pitch (1 octave in pitch = 1
octave in filter frequency).
Note: Unlike some of the other EXi, the PolysixEX
keyboard tracking does not include the effects of pitch bend.
This matches the behavior of the original synthesizer. If
desired, you can create the same effect by using JS X as an
AMS source for the
VCF CUTOFF .