Korg NAUTILUS Series, Parameter Manual, Page: 94 / 961

PROGRAM mode: HD-1
84
Random4–6 (Continuous) are smoothed versions of
Random 1–3, with ramps instead of steps. You can use them
to create more gentle random variations.
Start Phase [–180…+180, Random]
This controls the phase of the waveform at the start of the
note, in steps of 5 degrees.
If Key Sync is Off, the Start Phase will apply only to the first
note of the phrase.
Shape [–99…+99]
Shape adds curvature to the basic waveform. As you can see
in the graphic below, this can make the waveforms either
more rounded or more extreme. It can also be useful to
emphasize certain value ranges, and de-emphasize others.
For example, let’s say that you are using a triangle LFO to
modulate filter cutoff. If Shape emphasizes the high value
range, the filter will spend more time at the higher
frequencies. If it emphasizes the low range, the filter will
spend more time at the lower frequencies.
LFO Shape
Note: Shape does not affect the Square and Random 3
waveforms, since their values are always 99 or –99.
When these are selected, Shape is grayed out.
AMS (Shape) [List of AMS Sources]
This selects a modulation source for controlling the LFO’s
Shape. Modulating the shape can dramatically alter the
effect of the LFO—try it out!
For a list of AMS sources, see “Alternate Modulation Source
(AMS) List” on page 901.
Intensity [–99…+99]
This controls the depth and direction of the Shape
modulation.
Frequency [00…99]
This controls the speed of the LFO, before any modulation.
Higher values mean faster speeds, as shown in the table
below.
By using AMS modulation, you can also get speeds much
faster and much slower than are available through this basic
setting.
Frequency Fine [00…99]
This allows you to control the LFO frequency with greater
precision, giving you 98 additional steps for each step of the
main Frequency parameter.
When this is set to 00, the LFO speed is as set by the
Frequency parameter.
When this is set to 99, it’s the same as increasing the main
Frequency value by 1.
Stop [Off, On]
On (checked): When Stop is On , the LFO does not advance
normally, and the Frequency parameters are ignored.
Instead, the LFO simply generate its very first value (as
determined by the combination of the
Waveform , Start
Phase , Shape , and Offset ), and then holds that value until
the end of the note.
You can use this in conjunction with the Random waveforms
to create static, random modulation, with the value changing
only at note-on.
Off (unchecked): When Stop is Off , the LFO will function
normally.
Key Sync [Off, On]
On (checked): When Key Sync is On , the LFO starts each
time you press a key, and an independent LFO runs for each
note. This is the normal setting.
Off (unchecked): When Key Sync is Off , the LFO starts
from the phase determined by the first note in the phrase, so
that the LFOs for all notes being held are synchronized
together. The Fade and Delay settings will only apply to the
first note’s LFO.
Note that even if Key Sync is Off, each note’s LFO speed
may still be different if you modulate the Frequency by note
number, velocity, key scaling, or other note-specific AMS
sources.
Offset [–99…+99]
By default, almost all of the LFO waveforms are centered
around 0, and then swing all the way from
–99 to +99. This parameter lets you shift the LFO up and
down, so that–for instance–it’s centered on 50, and then
swings from –49 to +149.
For example, let’s say that you’re using an LFO for vibrato.
If the Offset is
0 , the vibrato will be centered on the note’s
original pitch, bending it both up and down.
If the Offset is +99 , on the other hand, the vibrato will only
raise the pitch above the original note.
Frequency Value Frequency in Hz
00 0.014 Hz
10 0.112 Hz
20 0.422 Hz
30 0.979 Hz
40 1.79 Hz
50 2.84 Hz
+99
0
–99
Shape = 0 (original waveform)
Shape = +99
Shape = –99
60 4.14 Hz
70 5.69 Hz
80 7.49 Hz
90 9.53 Hz
99 26.25 Hz
99 + Fine 99 32 Hz
Frequency Value Frequency in Hz