Specifications

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Appendix
B
B Logic Control—MIDI
Implementation
The following information is important for software vendors who want to create a
software integration for Logic Control/XT.
This documentation covers firmware version V1.0.
Note: All numbers are in hexadecimal format
Variable bytes are shown in italics and use characters other than a-f as a placeholder
All channel messages use running status messages. Once an initial 3-byte message has
been sent, the status byte is dropped from proceeding transmitted channel messages
to conserve bandwidth.
SysEx Message Header
The following documentation uses the place holder “<Hdr>” whenever the SysEx
header is transmitted or received. It has the following form:
F0 MIDI SysEx status byte
00 00 66 Mackie 3-byte SysEx manufacturer ID
ii Model ID
10 Logic Control
11 Logic Control XT
A device ID is not required, as each unit needs a dedicated MIDI cable.