Apple Logic Express 8 - Manual (Page 953)

Chapter 38 Working in the Environment 953
Opening the SysEx Fader Window
When you set a fader’s Output or Input definition to SysEx, the SysEx fader window
automatically opens. 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 selected events will
have their value altered by the fader value, when the SysEx fader window is closed.
Events that are not selected will be sent exactly as they appear in the window.
The value shown in the Val column (of selected events) is altered, if normal MIDI events
(controllers, program change, aftertouch, and so on).
For SysEx messages, you can determine:
 Which bytes are altered
 The format (MSB/LSB, BCD, nibbles, and so on) of the value
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 window. One way is
to have the fader learn the SysEx string.
To learn a SysEx string:
1 Click the MIDI In button at the top left of the SysEx window. If the button is pressed,
this means it is ready to receive incoming MIDI data.
2 Alter the parameter on your device.
3 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.