Allen&Heath GL4000 USER GUIDE - Manual (Page 41)

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C
HANNEL
M
UTES
Pressing any console mute switch transmits a MIDI Note On
message unless MIDI has been disabled. Similarly receiving
the correct Note On message will control the channel mute
unless it has been made 'mute safe' or MIDI disabled.
Console mutes are mapped to MIDI Note numbers as
shown. Running status is supported on receive and transmit.
TRANSMIT - Pressing a console mute transmits the
following Note On message:
9n cc vv cc 00
where n = console MIDI channel number
cc = console channel number
vv = 3FH for mute off, 7FH for mute on
RECEIVE - The console responds to the following MIDI
Note On message :
9n cc vv ( 00 is ignored)
M
UTE
P
ATCHES
Recalling a patch will transmit a MIDI Program Change
message unless the patch system is disabled or MIDI is
disabled. Similarly receiving the correct Program Change
message will recall a console patch unless disabled.
Console patches are directly mapped to MIDI Program
Change numbers 0 to 127. Running status is supported on
receive and transmit.
TRANSMIT and RECEIVE - The message format is :
Cn pp
where n = console MIDI channel number
pp = console patch number 0-127
MIDI D
UMP
F
ORMAT
The format for Dump In and Dump Out is identical. The
Dump is made up of 128 System Exclusive messages (or
packets) which contain the contents of the console memory.
TRANSMIT and RECEIVE - The format for a single packet
is as follows :
F0 <sysex header> <packet no.> <data> <checksum> F7
<sysex header> = 00 00 1A 50 05 VV vv nn
VV = major software version number V1.23
vv = minor software version number V1.23
nn = console MIDI channel number
<packet no.> = packet number from 0 to 127
<data> = 7 bit block of console data followed by a
number of 00 pad bytes.
<checksum> = checksum to allow error detection.