Logic Pro 9 User Manual - Help Library - Apple

Copy Matching Events and Apply Operation (Reverse Order)
This is the same as above, except the original is parsed after the processed copy. You
might want to use this when converting note events to pan controllers, for example. This
causes the pan message to be sent before the note. (Many synths don’t alter the pan
position of notes that are currently playing.)
Condition Splitter (True → Top Cable)
Events that match the conditions are altered by the operations, and sent to a transformer’s
top output. Events that don’t match the conditions are sent, unaltered, to a transformer’s
second output. Do not use the other outputs as nothing ever appears there.
Alternating Split
Events entering the transformer are alternated between the top two outlets. No conditions
or operations apply.
SysEx Mapper (Data Byte 1 → Position, Data Byte 2 → Value)
This transformer mode is used to create and edit SysEx messages. The Transformer window
operations are replaced by value fields that allow you to enter the structure of the SysEX
message including its length, whether or not a checksum is required, and the values of
bytes you don’t want to change in real time.
In the Conditions area, you select the type of MIDI event that will affect the data bytes
in the SysEx message. (Typically, you’ll use MIDI controller events.) Incoming MIDI events
will then change the SysEx message data bytes, according to the following rules:
• The data byte 1 value sets the position of the data byte.
1130 Chapter 37 Environment Objects Reference