Korg X5DR AI2 SYNTHESIS MODULE Owner's Manual page 97

Reference Guide
EG Time Velocity Sensitivity: This parameter allows you to control the Pitch EG Time
parameters using note velocity. For a positive value (+), time parameters will become shorter as
note velocity increases (as you play the keyboard more forcefully). A negative value (–) will have
the opposite effect.
84
Pitch EG change (time)
Pitch EG parameter
settings (all positive +)
Soft playing Strong playing