Korg PS60 Parameter Manual page 43

the keyboard, and positive ramps make the output go
higher.
Center‐High and High‐Top: negative ramps make the key‐
board tracking's output go down as you play higher on the
keyboard, and positive ramps make the output go up.
The effect on the filter cutoff is a performance of the ramp
values, as set below, and the Intensity to A (B) parameters.
When Intensity to A (B) is set to +99, a ramp of 50 changes
the filter frequency by 1 octave for every octave of the key‐
board, and a ramp of +99 changes the frequency by 2
octaves for every octave of the keyboard.
Bottom-Low
This sets the slope between the bottom of the MIDI note
range and the Key Low key. For normal key track, use nega‐
tive values.
Low-Center
This sets the slope between the Key Low and Center keys.
For normal key track, use negative values.
Center-High
This sets the slope between the Center and Key High keys.
For normal key track, use positive values.
High-Top
This sets the slope between the Key High key and the top of
the MIDI note range. For normal key track, use positive val‐
ues.
+Inf and –Inf ramps
+Inf and –Inf are special settings which create abrupt
changes for split‐like effects. When a ramp is set to +Inf or
–Inf, the keyboard tracking will go to its extreme highest or
lowest value over the span of a single key.
+Inf and –Inf Ramps
Ramp = –50
Ramp = –Inf
Key Low Center
Note: If you set the Cent Hi ramp to +Inf or –Inf, the High‐
Top parameter will be grayed out. Similarly, if you set the
Lo Cent ramp to +Inf or –Inf, the Bottom‐Low ramp will be
grayed out.
Key Follow
To create the classic Key Follow effect, in which the filter
frequency tracks the pitch of the keyboard:
1. Set the Filter "Frequency" to 30.
2. Set the Keyboard Track "Intensity to A" to +99.
3. Set the "Bottom‐Low" and "Lo‐Center" ramps to –50.
4. Set the "Center High" and "High‐Top" ramps to +50.
5. Set the "Center Key" to C4.
The settings for the "Low Key" and "High Key" don't
matter in this case.
[–Inf, –99...+99, +Inf]
[–Inf, –99...+99, +Inf]
[–Inf, –99...+99, +Inf]
[–Inf, –99...+99, +Inf]
Ramp = +Inf
Key High
Filter Filter1 Modulation
Filter Keyboard Track is also an AMS source
You can use the keyboard tracking as an AMS source to
modulate other parameters, just like the envelopes and
LFOs. Simply select Filter KTrk in the AMS list for the
desired parameter.
Filter EG
The Filter EG modulates the Filter A and B cutoff frequen‐
cies over time. You can control how strongly the EG will
affect the filters in three different ways:
• Set an initial amount of EG modulation, using the
Intensity to A and B parameters.
• Use velocity to scale the amount of the EG applied to the
filter.
• Use any AMS source to scale the amount of the EG
applied to the filter.
You can use all three of these at once, and the results are
added together to produce the total EG effect.
To set up the EG itself, including attack and release times,
levels, and so on, please see "Filter1 EG" on page 42.
Velocity to A
This lets you use velocity to scale the amount of the Filter
EG applied to Filter A.
Velocity control of Filter EG
In all examples below, Intensity to A = +50
A. Original EG
Original
Filter Cutoff
C. Velocity to A = –25
Original
Filter Cutoff
With positive (+) values, playing more strongly will increase
the effect of the Filter EG, as shown in example B above.
With negative (–) values, playing more strongly will intro‐
duce the opposite effect of the Filter EG–like inverting the
polarity of the envelope. You can use this in several different
ways:
• You can set an initial positive amount with the Intensity
to A/B parameters, and then reduce this amount with
velocity. In this case, the final effect of the EG is simply
diminished, and not actually inverted, as shown in
example C above.
• You can also set the Velocity to A/B amounts so that they
are greater than the initial amounts of Intensity to A/B. In
this case, the EG will have a positive effect at low veloc‐
ities, and an inverted effect at high velocities–as shown
in example D.
Intensity to A
This controls the initial effect of the Filter EG on Filter A's
cutoff frequency, before any velocity or AMS modulation.
The Filter EG's shape can swing all the way from +99 to –99.
Positive values increase the cutoff frequency, and negative
values decrease the cutoff frequency. For instance, please see
the graphic "Velocity control of Filter EG," above. The EG
shape in example A rises up at first, and then falls below 0
towards the end.
[–99...+99]
B. Velocity to A = +50
D. Velocity to A = –99
[–99...+99]
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