Korg kronos Operation Manual page 63

For example if, AMS is set to After Touch, applying
pressure to the keyboard produces an "auto-wah" effect.
Keyboard Track
Most acoustic instruments get brighter as you play higher
pitches. At its most basic, keyboard tracking re-creates this
effect by increasing the cutoff frequency of a lowpass filter
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 KRONOS 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 Key Track 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 Low
Break, Center, and High Break–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 Low Break
key and the Center key.
You can think of the resulting shape as being like two
folding doors attached to a hinge in the center. At the Center
key (the main hinge), the keyboard tracking has no effect.
The two folding doors swing out from this center point to
create changes in the higher and lower ranges of the
keyboard.
Intensity to A and Intensity to B adjust the effect that
keyboard tracking will have on filters A and B. For more
information, see "3–2a: Keyboard Track," on page 71 of the
Parameter Guide.
AMS Modulation
In addition to the EG, LFOs, and Key Track, you can use two
AMS sources to modulate the filters. For instance, you could
use the ribbon to change the brightness, or use the AMS
output of a Wave Sequence.
Detailed Program Editing Using Filters
Keyboard Track Shape and Intensity
Intensity = +99 (Original Shape)
Intensity = +50 (Less Effect)
Intensity = 0 (N o Effect)
Intensity = –99 (Inverted)
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