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9. AMP EG — SYNTH/VOCODER
ATTACK [0...127]
Specifies the time from note-on
(when the key is pressed) until the
attack level (maximum value of the
envelope) is reached.
DECAY [0...127]
Specifies the time from when the at-
tack level is reached until the sus-
tain level (SUSTAIN) is reached.
SUSTAIN [0...127]
Specifies the volume that will be
maintained after the decay time has
elapsed, as long as you continue
holding the key.
RELEASE [0...127]
Specifies the time from note-off
(when the key is released) until the
level reaches 0.
EG RESET [OFF, ON]
Specifies whether or not the EG will
be reset for the second and subse-
quent note-on. If a new note is
played before the previous note has
finished its release stage, the enve-
lope can either start over from zero,
or continue from the current value.
OFF ( ):
The note will start from the current
EG level.
ON ( ):
The second note-on will start from
a level of 0.
ON
OFF
Note on
Note on (Retrigger)
Note off
The "EG RESET" parameter is
available only when "VOICE
ASSIGN" is Poly, or when
"VOICE ASSIGN" is Mono or
Unison and "TRIGGER" is Multi.
Here you can make settings for the AMP EG, which applies time-variant change to the volume (➝Figure 9-1). By making AMP EG settings,
you can make the volume change as time passes. Create the desired volume curve by adjusting the ADSR parameters; ATTACK (knob 1),
DECAY (knob 2), SUSTAIN (knob 3), RELEASE (knob 4).
You can use AMP EG as a Virtual Patch source to modulate parameters other than volume. (➝p.30)
Figure 9-1
0
Attack Level
Time
Note on
Note off
Level
[1]: Attack Time [3]: Sustain Level
[2]: Decay Time [4]: Release Time
[1]
[3]
[4]
[2]
0
Time
Note on
Note off
Level
Attack: 0 Sustain: 127
Decay: — Release: 0
Organ
0
Time
Note on
Note off
Level
Attack: 40 Sustain: 75
Decay: 50 Release: 50
Strings
0
Time
Note on
Note off
Level
Attack: 0 Sustain: 0
Decay: 100 – 127 Release: 5–25
Piano
EG (Envelope Generator)
To a significant extent, each sound has its own distinctive volume curve.
For example when you play a note on a piano, the note begins at the
maximum volume, and gradually diminishes. When you release your
finger from the key, the sound will disappear quickly with a brief decay.
Volume curves such as this are an important aspect of how we identify the
sound of a specific instrument. This type of change also occurs in the tone
and pitch, as well as in the volume. On a synthesizer, this type of change is
produced by an EG. The microKORG has dedicated EGs for the filter and
for the amp. However since these EGs can be used as Virtual Patch
sources, you are also free to use them to vary the pitch or numerous other
aspects of the sound.
Some example settings are shown below.