Korg NAUTILUS Series, Parameter Manual, Page: 275 / 961

PROGRAM > MS-20EX: MG, EG, and Modulation 5–1: MG, EG, and Modulation
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HOLD TIME [0.00…10.00]
Adjusts the time for which the input state of the trigger
signal (e.g., note-on) is held after the trigger is released.
If the EG is triggered by a very short pulse, it may not have
time to complete its attack and decay times before going into
release. Increasing the
HOLD TIME effectively makes the
trigger pulse longer, giving the EG more time to complete its
attack and decay.
EG 2 HOLD TIME
ATTACK TIME [0.00…10.00]
Adjusts the time from the EG trigger (e.g., note-on) until the
EG reaches its maximum value.
This is scaled by MIDI CC#73.
DECAY TIME [0.00…10.00]
Adjusts the time the EG takes to descend from the peak to
the sustain level. It also controls the rate at which
SUSTAIN
LEVEL , below, responds to AMS modulation.
This is scaled by MIDI CC#75.
SUSTAIN LEVEL [0.00…10.00]
Adjusts the sustain level. The EG will stay at this level until
the trigger is released (such as when the note is released).
Unlike most other EGs, this level responds to AMS
modulation in realtime, moving at the programmed
DECAY
TIME .
This is scaled by MIDI CC#70.
Note: With the default connection to the HPF and LPF
frequencies, this setting has a slightly unusual effect. The
SUSTAIN LEVEL always produces the same effect as the
setting of the FREQUENCY knob. The EG2/EXT setting
controls the intensity of the filter modulation during the
Attack, Decay, and Release portions of the envelope, but
does not affect the Sustain at all.
Effectively, the EG shifts up and down inversely to the
SUSTAIN LEVEL , as shown below. When the SUSTAIN
is high, the EG shifts down; when the SUSTAIN is low, the
EG shifts up.
RELEASE TIME [0.00…10.00]
Adjusts the time from the trigger release (e.g., note-off) until
the level decays to zero.
This is scaled by MIDI CC#72.
Using EGs 3–6 to control the amplitude
EG 2 is always connected to the VCA. It’s possible,
however, to force the VCA to its maximum value at all
times, and then use AMS modulation of the main VOLUME
knob to control the amplitude from any of the multi-segment
EGs 3–6. To do so:
1. On the Patch Panel page, select the main VOLUME
knob.
2. Set the VOLUME knob to 0.
3. Set the VOLUME AMS Intensity to +10.00.
4. Assign the desired EG (3–6) as the knob’s AMS
source.
5. Set the VOICE ALLOCATION parameter to the
same EG.
6. In the Patch Panel, select the Mod Switch jack, which
looks like this:
7. Set the Mod Switch AMS Source to AMS Mixer 1.
8. In AMS Mixer 1, set the Type to Gate, the Source to
Note Number, and the Threshold to -99.
9. Set both Below Threshold and At & Above Threshold
to fixed values of +33.
These settings produce a “5 volt” signal on the Patch Panel,
which, when connected to the INITIAL GAIN input, sets the
VCA to its maximum level. This lets you control the
amplitude entirely via the
VOLUME AMS.
10.On the Patch Panel, connect the Mod Switch jack to
the VCA INITIAL GAIN input.
11.For the EG assigned in step 4, set up the times, levels,
and curvatures as desired.
Remember to use curvature on the EG segments, for an
analog feel!
5–1e: EXTERNAL MODULATION 1
Source [Off, MG Tri, MG Pulse, EG 1, EG 1 REV,
EG 2, EG 2 REV, List of AMS Sources]
This selects the modulation source to control the parameters
below. For a list of AMS sources, see “Alternate Modulation
Source (AMS) List” on page 901.
HPF CUTOFF [–10.00…+10.00]
Specifies the depth and direction of the modulation applied
to the high-pass filter (HPF)
CUTOFF FREQUENCY .
LPF CUTOFF [–10.00…+10.00]
Specifies the depth and direction of the modulation applied
to the low-pass filter (LPF)
CUTOFF FREQUENCY
VCO1 PULSE WIDTH [–10.00…+10.00]
Specifies the depth and direction of the modulation applied
to the oscillator 1 (VCO1)
PULSE WIDTH .
VCO2 PITCH [–24.00…+24.00]
Specifies the depth and direction of the modulation applied
to the oscillator 2 (VCO2)
PITCH , in semitones.
AMP [–10.00…+10.00]
Specifies the depth and direction of the modulation applied
to the amp (
VCA ). This scales the combined effect of the
VOLUME knob and its AMS modulation.
Hold Time
Trigger
On
Trigger
Off
Attack
Time
Decay
Time
Release
Time
Change to
Parameter
Value
Sustain
Level
Time
Change to
FREQUENCY
knob setting
Filter Frequency
Sustain = High
Sustain = Low
Sustain = Medium