Ktrk (Keyboard Track) - Korg KROSS Parameter Manual

Program mode
6–5: KTRK (Keyboard Track)
This page contains the settings for Oscillators 1 and 2's filter
keyboard track. Among other things, you can set up complex
keyboard tracking shapes, and control how the tracking affects
filter cutoff.
Filter B is available when the Filter Routing is set to Serial or
Parallel. Otherwise, the parameters for Filter B will be grayed out.
Most acoustic instruments get brighter as you play higher pitches.
At its most basic, keyboard tracking re-creates this effect by
raising the lowpass filter cutoff frequency as you play higher on
the keyboard. Usually, some amount of key tracking is necessary
in order to make the timbre consistent across the entire range.
The KROSS keyboard tracking can also be much more complex,
since it allows you to create different rates of change over up to
four different parts of the keyboard. For instance, you can:
• Make the filter cutoff increase very quickly over the middle of
the keyboard, and then open more slowly or not at all in the
higher octaves.
• Make the cutoff increase as you play lower on the keyboard.
• Create abrupt changes at certain keys, for split-like effects.
How it works: Keys and Ramps
The keyboard tracking works by creating four ramps, or slopes,
between five keys on the keyboard. The bottom and top keys are
fixed at the bottom and top of the MIDI range, respectively. You
can set the other three keys named Key Low, Center, and Key
High to be anywhere in between.
The four Ramp values control the rate of change between each pair
of keys. For instance, if the Low-Center Ramp is set to 0, the
value will stay the same between the Key Low key and the Center
key.
The Key value will be the break point, and the slope of the lower
and higher regions on the keyboard is specified by the Ramp.
At the Center key (the main hinge), the keyboard tracking has no
effect.
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.
Int. to A (Intensity to A)
This controls how much the keyboard tracking will affect Filter
A's cutoff frequency. The overall effect of the Keyboard Track is a
combination of this Intensity value and the overall Keyboard
Track shape.
With positive values (+), the effect will be in the direction
specified by keyboard tracking; if the ramp goes up, the filter
cutoff will increase.
With negative values (–), the effect will be in the opposite
direction; if the ramp goes up, the filter cutoff will decrease.
26
Bottom- Low- Center- High-
Low Center High Top
Low Break Center High Break
[–99...+99]
Keyboard Track Shape and Intensity
Intensity = +99 (Original Shape)
Intensity = –99 (Inverted)
Low Break Key
Int. to B (Intensity to B)
This controls how much the keyboard tracking will affect Filter
B's cutoff frequency.
Key
Low Break
This specifies the note where the two sloped lines in the lower
range will be connected.
Center
This specifies the note that will be the break point for the center of
keyboard tracking. At this key, the keyboard tracking has no effect
on the filter cutoff, or on any AMS destinations.
Hight Break
This specifies the note where the two sloped lines in the upper
range will be connected.
Tip: You can also set the note value and velocity value by the
keyboard (see page 13 of the Operation Guide).
Ramp
Positive ramp values mean that the keyboard tracking output
increases as you play farther from the Center; negative ramp
values mean that it decreases.
Because of this, the meanings of positive and negative ramp
settings will change depending on whether the ramp is to the left
[1, 2] or right of the Center.
Bottom-Low and Low-Center: negative ramps make the
keyboard tracking's output go down as you play lower on the
keyboard, and positive ramps make the output go higher.
Center-High and High-Top: negative ramps make the keyboard
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 combination 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 keyboard, 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 Low Break. For normal key track, use negative values.
Center Key High Break Key
[–99...+99]
[C–1...G9]
[C–1...G9]
[C–1...G9]
[–Inf, –99...+99, +Inf]