Apple Logic Pro 7 User Manual download pdf (Page 226)

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226 Chapter 5 The Environment

• Copy matching Events Apply Operation (rev. 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 the

transformer’s top output. Events that don’t match the conditions are sent, unaltered,

to the transformer’s second output. Do not use the other outputs—as nothing ever

appears there.

• Alternating Split

Events entering the transformer will be alternated between the top two outlets. No

conditions or operations apply.

• SysEx Mapper (‘1’ → position, ‘2’ → value)

This transformer mode is used to create and edit SysEx messages. You first need to

enter the structure of the SysEx message in the transformer window—including its

length, whether or not a checksum is required, and the values of bytes you don’t

want to change in real time. Next, 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 -1- value sets the position of the data byte.

• The -2- value sets the value of the data byte.

The channel controls the action to be taken:

• Channel 1: The changed SysEx message is sent.

• Channel 2: The changed SysEx message is not sent.

• Channel 3: The unchanged SysEx message is sent.

• Channels 4 to 16: No meaning (reserved for future use).

The purpose of the channel controls is to allow multiple bytes of a SysEx message to

be modified before it is sent.

The Filter non-matching parameter in the SysEx mapper transformer window

prevents incoming MIDI events (that don’t control the SysEx message) from being

passed through. Typically, you will want this feature turned on, to prevent interloping

controller data from invading the SysEx data stream.

• Track Automation Splitter (true → to cable)

If the condition matches, incoming events will be sent to the Track Automation of the

Object connected to the top cable of the transformer—after passing through the

“Operation” field. With the appropriate “Operation” field settings, incoming MIDI data

is transformed into Fader event data—allowing the automation of any possible

parameter of the connected Mixer Object. Exception: Channel volume and channel

pan uses Control events.

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Apple Logic Pro 7 User Manual Page 226

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