Steinberg HALION4 Mode D'emploi page 204

3. Put in parentheses to specify the execution order, for example A AND (B OR C).
If you edit the expression manually, the AND/OR menus and the NOT and On buttons
are not available.
Selecting a Condition
You can combine up to 8 conditions into an expression using logical operations. For
example, the expression "Note-on AND Sustain On" is TRUE when you play notes
while holding the sustain pedal down. Any assigned zones only play back if the whole
expression is TRUE.
For each of the conditions, you can make the following settings:
Option
Condition
On
Min
Max
AND
OR
NOT
Expression
The following options are available on the Condition pop-up menu:
Option
Note-on
Note-off
Forced Note-off
Key Up
Sustain On
Description
You select the event for the condition from the Condition pop-up
menu. The condition is TRUE when the event is of the right type and
within the specified range.
Click this button to activate the corresponding condition.
Use the fader and value field to adjust the minimum value of the
range. This is the lowest possible value for a TRUE condition.
Use the fader and value field to adjust the maximum value of the
range. This is the highest possible value for a TRUE condition.
Combines two conditions logically. The expression is TRUE if both
conditions are TRUE.
Combines two conditions logically. The expression is TRUE if one of
the conditions is TRUE.
Activate this to invert the condition. A condition that was previously
TRUE becomes FALSE, and vice versa.
Displays how the logical operators and conditions are executed.
Click the "e" button to edit the Expression manually. Put in
parentheses to influence the execution order.
Description
The condition is TRUE when a key is pressed. You can specify a
key range for this event.
The condition is TRUE when a note is released and a matching
note-on event was received. This includes notes that are released
by lifting the sustain pedal. You can specify a key range for this
event.
This option allows you to avoid triggering the wrong release
samples after switching between articulations of an instrument.
Note that for this to work, the layers of the note-on and note-off
samples must reside in the same layer of the corresponding Key
Switch MegaTrig module.
The condition is TRUE when a note is released. Forced means that
a matching note-on event is not needed. In other words, the note-
off event always passes through. This includes notes that are
released by lifting the sustain pedal. You can specify a key range for
the note-off events.
The condition is TRUE when a note is released even when the
sustain pedal is pressed. This condition uses the full range of the
keyboard.
The condition is TRUE when the sustain pedal is pressed.
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MIDI Modules Reference
MegaTrig