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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]