Midi Sysex - dbx DriveRack 480 User Manual

Appendix A
A.1 MIDI SysEx
A.1.1 SYSEX MESSAGE FORMAT
SYSEX HEADER (SYS_HEAD
F0(h) System Exclusive 'Begin Message' byte
00(h)
01(h) Manufacturer's ID Number (dbx)
1E(h)
00(h) - 7F(h) Device ID (7F(h) means "everyone listen")
On(h) or 7F(h) Product ID (each product has a unique ID - DriveRack ID is 03(h)
SYSEX Procedure and Data
pp
pp = Procedure number. The different procedure's names and general formats are described
in the Procedures Section.
dd(1)1, dd(1)2......dd(n)1, dd(n)2
dd = Data as needed by procedures. Since the standard MMA MIDI Specification reserves 80(h) through FF(h) (decimal
numbers 128 through 255) for specific commands, a split byte format is adopted for all data communication in this SYSEX
implementation. dd(n)2 denotes the 1st through 7th bits of the nth byte and dd(n)1 denotes th 8th bit of the nth byte.
Note: All data that is requested or received, is in split byte format unless noted otherwise.
SYSEX "Message End" byte
F7(h) System Exclusive 'End Message' byte
A.1.2 SYSEX Procedures
In the following section, SYS_HEAD refers to a valid System Exclusive header. The System Exclusive header starts with
the System Exclusive status byte, and includes all bytes through the dbx Product ID. F7(h) is the System Exclusive
'Message End' byte. All SYSEX numbers in the format definition of each procedure are given as hexadecimal values,
along with this symbol (h) for clarification. Binary numbers are identified with this symbol (b).
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