RS-232 Serial Command API
The EasyUSB Mixer/Amp serial command API uses hex strings similar to those used by Vaddio
cameras. “Get” commands (inquiries) return a response string. The format of a “get” response is a 4-digit
response code, a space, and a two-digit hex value. Most "Set" commands return the response 4100
(OK), usually followed by a two-digit code indicating the action requested in the command.
For RS-232 communication settings and connector pin-out, see
The following commands and inquiries are available for the EasyUSB Mixer/Amp.
Function
Command
Expected Response
Get microphone mute status
5101
4101 00 (not muted)
4101 01 (muted)
Get microphone volume (range is 0 to 29, in steps of 1
dB)
5103
4103 vv (vv = volume value, 00 to
1D)
Get speaker volume (range is 0 to 58, in steps of 0.5
dB)
5102
4102 vv (vv = volume value, 00 to
3A)
Unmute microphones
6101 00
4100 00
Mute microphones
6101 01
4100 01
Decrease microphone volume
6103 00
4100 00
Increase microphone volume
6103 01
4100 01
Decrease speaker volume
6102 00
4100 00
Increase speaker volume
6102 01
4100 01
Disable serial command echo
6121 00
(none)
Enable serial command echo
6121 01
4100 01
Complete Manual for the EasyUSB Mixer/Amp Audio Mixer and Amplifier
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