Apple Logic Express 8 - Manual (Page 498)

498 Chapter 20 Editing MIDI Events in the Transform Window
Exponential Velocity
Alters the scaling of the velocity curve. This preset is of particular use on software or
MIDI instrument parts. Velocity is generally used to control the initial volume of
instruments, but is often used to trigger filter envelopes, making the sound brighter or
darker. Transforming regions is much faster than changing the velocity scaling or filter
parameters of your MIDI or software instruments.
Change the Velocity value field in the Operations area to change the velocity curve.
This is instantly reflected in the map area below.