Volume control table – Galaxy Audio DS-SP24 User Manual
Page 36
● USB/RS485 Remote Control protocol for Preset Changing and Gain/Volume controls
The following is the HEX Code for controlling the DS-SP24 recall presets and master volume
control:
Preset Changing:
CMD_RECALL_PRESET: CMD=1BH
A. The User has to send the following Command, including the number of the preset to load on the
unit:
TX:
XX = 0,..,31 (ID device)
Npreset=0,...,23 Presetnumber
The DS-SP24's microcontroller will check if the Preset is initialized (available or not yet created...)
B. If YES, then the microcontroller will send back to the User (eg Crestron/AMX Remote Control..)
the same frame used by the command.
RX:
So in this case, if the user gets back EXACTLY what was sent, the preset is existing and loaded on
the unit.
C. If the preset that the user wanted to load is NOT YET INITIALIZED (not yet created, so not
Available...), the microcontroller will notify that to the user, sending back the following frame:
RX:
STX
ID_M
ID_N
CMD
D0
D1
D2
D3
D4
D5
D6
D7
ETX
F0H
C1H
XX
1BH
NPreset
00H
00H
00H
00H
00H
00H
00H
F7H
STX
ID_M
ID_N
CMD
D0
D1
D2
D3
D4
D5
D6
D7
ETX
F0H
C1H
XX
1BH
NPreset
00H
00H
00H
00H
00H
00H
00H
F7H
STX
ID_M
ID_N
CMD
D0
D1
D2
D3
D4
D5
D6
D7
ETX
F0H
C1H
XX
1BH
FFH
00H
00H
00H
00H
00H
00H
00H
F7H
Volume Control Table
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