®DriveRack™ User Manual108Appendix A DriveRack ™A.1.1 SYSEX MESSAGE FORMATSYSEX HEADER (SYS_HEADF0(h) System Exclusive 'Begin Message' byte00(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 Datapppp = Procedure number. The different procedure's names and general formats are describedin the Procedures Section.dd(1)1, dd(1)2......dd(n)1, dd(n)2dd = Data as needed by procedures. Since the standard MMA MIDI Specification reserves 80(h) through FF(h) (decimalnumbers 128 through 255) for specific commands, a split byte format is adopted for all data communication in this SYSEXimplementation. 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” byteF7(h) System Exclusive 'End Message' byteA.1.2 SYSEX ProceduresIn the following section, SYS_HEAD refers to a valid System Exclusive header. The System Exclusive header starts withthe 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).A.1 MIDI SysEx