Apple Logic Pro X - Manual (Page 475)

Chapter 15 Advanced edit features 475
Define the operation for all other event parameter columns
m Choose one of the following operations for the Channel, First or Second Data Byte, and Length
columns (as required). One or more value fields will appear below the respective operations
pop-up menus.
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Thru: The event passes through unaltered.
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Fix: Fixes the event parameter to the set value. You could use this to set the pitch of all note
events to a specific note value, making it easy to convert a bass groove into a hi-hat pattern,
for example.
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Add: Adds the value to events. For example, a value of 8 could be added to all incoming note
velocity events, thus making the notes louder.
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Sub: Subtracts the value from events. You could use this to reduce all controller 10 (Pan) events,
thereby narrowing the stereo spread of an electric piano part, for example.
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Min: Parameter values lower than the defined value are replaced (by this value). Larger
parameter values are not altered. You could use this to replace all note velocity messages
below 45, thereby reducing the dynamic range of a MIDI region—or put another way, making
the soft notes louder.
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Max: Parameter values that exceed the set value are replaced by it. Smaller event parameter
values remain unaltered. This could be used to restrict filter resonance modulation events
above a value of 100, for example, resulting in a softer filter sound.
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Flip: All parameter values that match the conditions are reversed around a pivot point (the
value defined here). Events above this value are moved by the same distance below it, and
vice versa. For example, you could move a note from E3 to G#2, if the pivot point value was
set to C3. Effectively, the E3 event, which is 4 (pitch) values above the C3 pivot point is flipped
to 4 values below (G#2). This can also be used to reverse selected note positions around a
particular bar or beat, as another example.
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Mul: The parameter value is multiplied by the set value (accurate to four decimal places). The
effect, and use, of this operation is best illustrated by the Half Speed preset.
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Div: The parameter value is divided by the set value (accurate to four decimal places). The
effect, and use, of this operation is best illustrated by the Double Speed preset.
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Scale: The parameter value is multiplied by the top value, and the bottom value is then added.
This is a combination of Mul and Add. If you enter a negative number here, values can be
subtracted from—rather than added to—the value resulting from the multiplication.
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Range: Parameter values outside the set value range are replaced by the values of the (range)
limits (combination of Min and Max).
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Random: Random values are generated within the set limits.
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+-Rand.: A random value between zero and the set value (positive or negative) is added.
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Reverse: The parameter value is reversed within its value range (no value can be set here).
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Quantize: The parameter value is quantized to a multiple of the set value.
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Qua & Min: Like Quantize, but the quantization does not fall below the set value (a
combination of the Quantize and Min functions, with the same set value).
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Expon.: The parameter value is scaled exponentially. The extreme values (0 and 127) remain
unaltered. The set value determines the shape of the curve. Positive values result in the
exponential scaling of data (increasing input values remain lower for longer, and then rise
quickly), and negative values result in the logarithmic scaling of data (decreasing input values
remain higher for longer, and then drop off more quickly).