The following RS232 protocol allows the Synergy AU4 range of audio controllers to be operated by a third party RS232 controller. It is not required when used with the iKON Synergy controllers.





Command
Action
AU4 Reply
UN
Set mute on
U1
UO
Set mute off
U0
RU
Request mute status
U1 if ON, U0 if OFF
Microphone Control
Command
Action
AU4 Reply
MN
Turn microphone ON
M1
MO
Turn microphone OFF
M0
RM
Request microphone state
M1 if ON, M0 if OFF
Mute Control
This mutes the program audio only and not the microphone.
AU4 Level range

The level range available on the AU4 can be +15dBu to –15dBu OR +15dBU to –48dBU depending upon the setting of the rear panel bit switch. The returned level with be signed + or -.



Input Select
Command
Action
AU4 Reply
Notes
IN1
Select input 1
IN1##
Where ## is the current level of the selected input.
(See above)
IN2
Select input 2
IN2##
IN3
Select input 3
IN3##
IN4
Select input 4
IN4##
RI
Request number of currently selected input
IN##
Where # is the input number.
Output Volume Control
Command
Action
AU4 Reply
Notes
VU
Volume up 1 step
VU
Where ## is the current level
VD
Volume down 1 step
VD
V+
Ramp volume up
V##
V-
Ramp volume down
V##
VS
Stop ramp
VS

The start up level when power is applied can be set to 0dBu or the last user setting dependent upon the setting of the rear panel bit switch.


To use set the rear bit switch to the RS232 position prior to powering the unit.

All communications is at 9600 Baud with 8 data bits, 1 stop bit and no parity.

All commands are plain ASCII text

AU4 RS232 control protocol

Input Volume Control
Command
Action
AU4 Reply
Notes
V1##
Set Level to
V1 ##
Where ## is the level from +12 to -48
RV1
Request Level
V1 ##
Input 1 shown. Other inputs are identical just substitute 1 with 2, 3, or 4
Example Command

To select Input 2 and increment its volume

Send in ASCII the command

IN2

Followed by the command

VU

This will increase the volume of Input to by 1 step
Send the command repeatedly to increase the volume by further steps.