Korg kronos Operation Manual page 65

For example if you set AMS to JS-Y (CC #02), tremolo will
be applied when you move the joystick of KRONOS toward
yourself, or when CC#02 is received.
Amp EG
The Amp EG lets you control how the volume changes over
the course of a note.
Every instrument has its own characteristic volume
envelope. This is part of what gives each instrument its
identifiable character.
Conversely, by changing the volume contour—for instance,
applying a string-like Amp EG curve to an organ
multisample—you can produce interesting and unusual
sounds.
Piano
Organ
Strings
Drive
The Drive circuit adds saturation and overdrive to the sound,
for everything from subtle fattening to drastic distortion.
Unlike an overdrive effect, Drive processes each voice
individually, so the timbre stays the same regardless of how
many voices are being played.
The two main parameters, Drive and Low Boost, work
together to create the overall effect.
Drive controls the amount of edge and bite in the timbre.
Low settings will produce mild saturation, and higher
settings create more obvious distortion.
Often, it's useful to increase the Low Boost along with the
Drive.
Note: even when the Drive amount is set to 0, the Drive
circuit still affects the timbre. If your goal is a completely
pristine sound, use the Bypass control instead.
Low Boost is a special low-frequency EQ which controls the
body character of the sound. The specific EQ frequencies
affected will change with the Drive setting.
Higher amounts increase the bass boost, and will also
intensify the effect of the Drive parameter.
Detailed Program Editing Using the Amp section
57