P–Filter Eg (Filter Envelope) - Korg KROSS Parameter Manual

Program mode
7: P–FILTER EG (Filter Envelope)
The Filter EG, or Envelope Generator, lets you create complex,
time-varying changes to the cutoff frequencies of Filters A and B.
The parameters on this page control the shape of the EG. Among
other things, you can:
• Create the basic EG shape by setting the levels and times of
each segment.
• Control the curvature of each EG segment, for subtle control
over the modulation shape of the EG.
• Set up complex modulation of EG levels and times.
• Set up an AMS source, such as an LFO, to restart the EG.
To control how much effect the EG has on the filters, use the Filter
EG parameters on the P–FILTER> EG-I page, as described under
"6–3: EG-I (EG Intensity)" on page 24.
Filter EG is also an AMS source
You can use the Filter EG as an AMS source to modulate other
parameters, just like the keyboard tracking and LFOs. Simply
select the Filter EG in the AMS list for the desired parameter.
7–1: ENVELOPE
OSC (Oscillator Select)
Select the oscillator (1 or 2) that you want to edit.
Note: Oscillator 2 can be selected if Oscillator Mode is set to
Double.
Reset AMS
This selects an AMS source to reset the EG to the start point. For
instance, you can use a tempo-synced LFO to trigger the EG in a
repeating rhythm. This reset is in addition to the initial note-on,
which always causes the EG to start.
For a list of AMS sources, please see "AMS (Alternate
Modulation Source) List" on page 292.
Threshold
This sets the AMS level which will trigger the EG reset. Among
other things, you can use this to adjust the exact point in an LFO's
phase where the EG will be reset, effectively controlling its
"groove" against other rhythmic effects.
When the threshold is positive, the EG triggers when passing
through the threshold moving upwards. When the threshold is
negative, the EG triggers when passing through the threshold
moving downwards.
Note: With some LFO shapes, and with faster LFO speeds, the
LFO may not always reach the extreme values of +99 or –99. In
this case, setting the Threshold to these values may cause
inconsistent behavior, or may mean that the EG doesn't reset at all.
If this happens, reduce the Threshold until the EG triggers
consistently.
28
Filter EG
Change to
An envelope creates a modulation signal by moving from one level
to another over a specified time, and then moving to another level
over another period of time, and so on.
The parameters below let you set five levels, the amount of time it
takes to go from each of the levels to the next, and the shape (from
linear to curved) of each transition.
Time
Higher values mean longer times, as shown below:
10
20
30
40
50
60
Threshold
70
80
90
99
Attack
This sets how long the EG takes to move from the Start level to the
Attack level.
[1, 2]
For the fastest possible attack time, you can set the Start level to
+99; in this case, the EG will start instantaneously at its maximum
value.
Dcy/Brk (Decay)
[List of AMS Sources]
This sets the time it takes to move from the Attack level to the
Break level.
Slp/Sus (Slope)
This sets how long the EG takes to move from the Break level to
the Sustain level. Once it reaches the Sustain level, the EG will
stay there until note-off (unless it is reset via AMS).
[–99...+99]
Release
This sets how long it takes the EG to move from the Sustain level
to the Release level.
Curve
For the sake of simplicity, most of the diagrams in this manual
show envelopes as being made out of straight lines. In actuality,
though, envelopes are more likely to be made out of curves.
In other words, each segment's level will change quickly at first,
and then slow down as it approaches the next point. This tends to
sound better than straight, linear segments.
Classic analog synth envelopes made these curved shapes
naturally. The KROSS goes a step further than vintage synths,
however, and lets you control the amount of curvature separately
for each of the four envelope segments.
Attack Break
Level
Level
Star t
Level
Attack Decay
Time Time
Note-on or reset
EG Value Actual Time
10 ms
44 ms
104 ms
224 ms
464 ms
944 ms
1.8 seconds
3.8 seconds
10.9 seconds
87.3 seconds
Sustain
Level
Release
Level
Time
Slope Release
Time Time
[00...99]
[00...99]
[00...99]
[00...99]