Audio; Establishing.an.audio.tie; Audio.breakaway; Volume.control.(Output.1.Only) - Extron electronics MPX 423 A User Manual

Audio

The MPX 423 A is also a 12x2 audio matrix switcher, where any of the 12 inputs can
be routed to one or both outputs simultaneously.
Establishing an audio tie
Regardless of the video switching mode to which the unit is configured (single or
separate), the MPX 423 A also emulates a 12x2 audio switcher.
To make an audio-only tie:
1. Press the I/O button until only the Audio LED is lit.
2. Use any one of the three Outputs buttons to select output 1 or 2 (output LEDs
1 or 2 will be lit in all three video groups to indicate which output, 1 or 2, is
selected).
3. Select any of the twelve inputs (buttons 1 - 12).
The selected input (1 - 12) is routed to the selected output (1 or 2).
N When establishing an audio tie, please note:
• The front panel audio controls, Mute and Volume, only control audio output
#1. Audio output #2 is controllable via RS-232 and Ethernet.
• A flashing LED indicates an audio tie or a mute.
• When an input LED and the I/O Audio LED are flashing simultaneously, the
video input is being followed by its associated audio signal.
Audio breakaway
Audio breakaway allows you to route the audio signal separately from the video
signal. Any audio signal can be selected and sent with any video signal to one or
all outputs in any combination, simultaneously.
Audio breakaway switching can be done via front panel control, through RS-232, or
via Ethernet remote control.
Volume control (output 1 only)
Use the Audio Output 1 Volume knob to adjust the volume of audio output 1.
Turn the knob clockwise to increase volume at a rate of 1 dB per step of the digital
potentiometer. Turn the knob counterclockwise to decrease volume.
N Control of audio output 2 is available through RS-232 or Ethernet/Telnet only.
The volume adjustment is speed sensitive. To avoid large audible volume jumps
when the knob is turned quickly, the volume is changed in smaller steps.
Audio mute (output 1 only)
The Mute button toggles between mute and unmute for audio output 1. The Mute
LED lights when audio is muted. If a muted output is not at maximum attenuation,
it is disconnected. Press the Audio Mute button again to unmute the output and
return to the previous output level.
N Control of audio output 2 is available through RS-232 or Ethernet/Telnet only.
MPX 423 A • Operation 3-7