Apple Logic Pro 7 User Manual download pdf (Page 257)

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Chapter 5 The Environment 257

You can also specify SysEx as an In definition, but this has limited usefulness because

the incoming message (presumably SysEx) must be very short, in order to be

recognized. This is a side-effect of the fact that SysEx messages can be of any length,

and Logic must break them into small packets to avoid interrupting other MIDI

activities.

Opening the Fader Event Editor window

When you set a fader’s Out or In definition to SysEx, its event list window opens up. You

can also open this window at any time by double-clicking on the word SysEx in the

fader’s Parameter box.

An important thing to remember about the SysEx fader is that only events that are

selected when the event list window is closed will have their value altered by the fader

value. Events that are not selected will be sent exactly as they appear in the window.

Selected events will have the value shown in the Val column of the list altered, if they

are normal MIDI events (controllers, program change, aftertouch, and so on). For SysEx

messages, you can set both; which byte(s) are altered, and the format (MSB/LSB, BCD,

nibbles, and so on) that the value will take. You can also specify a checksum format, if

necessary.

Creating a SysEx Message

There are two ways of entering SysEx messages in the SysEx fader’s event list. One way

is to have the fader “learn” the sysex string. To do this, you manually send the

corresponding SysEx message from your synthesizer, using its onboard controls.

• If you haven’t already done so, connect the MIDI output of the synthesizer to the

MIDI input of your computer.

• Click the MIDI In button at the top left of the SysEx event list. If the button is red, this

means it is ready to receive incoming MIDI data.

• Alter the parameter on your device. The corresponding SysEx message will be

displayed and the MIDI In button will switch off automatically.

Another way is to type the sysex string into the event list. (Consult your MIDI device

manual for SysEx documentation). Use of this method qualifies you as a confirmed MIDI

freak. Here’s how you go about it:

• Command-click the SysEx button. A generic SysEx message appears.

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Apple Logic Pro 7 User Manual Page 257

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