Apple Logic Pro 8 - Manual (Page 933)

Chapter 39 Working in the Environment 933
A generic SysEx message appears.
 The first data byte in the top line (directly after the word SysEx in the Num column) is
the manufacturer’s ID. This may be several data bytes long (as there are more than
128 manufacturers of MIDI devices).
 The manufacturer’s ID is usually followed by a device type ID, an individual device ID,
a data type ID (which could be several bytes) and, if necessary, the number of the
multi-timbral sub channel, the identification number(s) of the sound parameters plus
the value of the sound parameter. There are no uniform standards that apply here.
 Data bytes are normally input as decimal numbers. To enter them in hex, place a $ in
front of values when you type them in. View > SysEx in Hex Format allows you to see
all values in hexadecimal.
 The last data byte (the EOX indicating the end of the SysEx message) is entered
automatically by Logic Pro. The number of data bytes in the SysEx message can be
decreased or increased by clicking the plus and minus symbols before and after the
word .
Although you can have any number of messages (of any kind) in the SysEx fader’s
event list there is only one fader value, and all selected messages will adopt this value.
You can use a similar method to create any kind of MIDI or meta event in the SysEx
fader window. Command-clicking any of the eight event type buttons (note, program
number, pitch bend, controller, channel pressure, poly pressure, SysEx, and meta event)
creates a new event of that type. Meta events can be created by using the expanded
view button—featuring the 0’s and 1’s on its face.
Setting the SysEx Data Format
The terms SUM for the checksum and VAL for the fader value being sent are displayed
within the SysEx string.
To set the checksum and value of a SysEx event:
1 Select the events you want to alter.