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 for 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.
2.
3.
NOTE: When establishing an audio tie, please note:

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.
•
•
NOTE: Control of audio output 2 is available through RS-232 or Ethernet and Telnet
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)

Press the Mute button to toggle 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.
NOTE: Control of audio output 2 is available through RS-232 or Ethernet and Telnet
Press the I/O button until only the Audio LED is lit.
Use any one of the three Outputs buttons to select output 1 or 2 (output LEDs 1 or 2
light in all three video groups to indicate which output, 1 or 2, is selected).
Select any of the twelve inputs (buttons 1 - 12). The selected input (1 - 12) is routed to
the selected output (1 or 2).
The front panel audio controls, Mute and Volume, only control audio output 1.
•
Audio output 2 is controllable via RS-232 and Ethernet.
• A blinking LED indicates an audio tie or a mute.
• When an input LED and the I/O Audio LED blink simultaneously, the video input is
being followed by its associated audio signal.
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.
only.
only.
MPX 423 A • Operation 13