Emagic Logic fun - Aftertouch Events; Poly Pressure Events

Event Type Structure
169
User Guide
Version 4.1
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Aftertouch Events
Aftertouch (or channel pressure) events are generated by a
mechanical pressure sensor beneath the keyboard. The result-
ing sound modulation affects all the notes on that particular
MIDI channel.
Num
This column is empty with aftertouch events, since they have
only one data byte.
Val
Strength of the pressure on the keyboard (0-127).
Poly Pressure Events
Poly pressure events are generated by mechanical pressure
sensors beneath each individual key. The resulting sound
modulation affects only that particular note.
Only a few keyboards currently support this capability.
Num
MIDI note.
Val
Strength of the pressure on the key.