User Manual

Mixer
MRX Designer User Guide
91
❑ Mixer
The MRX provides four types of mixers: Delay Matrix, Dugan Automixer, Matrix Mixer, and
Summer. When placing this component in the design sheet, select the number of channels that is
appropriate for input and output (and in the case of the Delay Matrix, specify the maximum delay
value). The Delay Matrix has a maximum delay of 500 ms, and the maximum number of inputs and
outputs is 16-in/16-out. The maximum number of inputs for the Dugan Automixer is 24 channels.
The maximum number of inputs and outputs for the Matrix Automixer is 64-in/64-out. The
maximum number of Summer inputs and outputs is 16-in/1-out. Since the Summer simply mixes
and outputs the input audio, it has no component editor. The illustration used in the following
explanation is for the case of 16 channels.
Starting from the top, the Dugan Automixer has the following outputs.
Discrete Out (processed sound) × number of mics
Group Mix Out (the mixed sound of each group) × number of groups
“Dugan Automixer” component editor
In a system used for unscripted speech, the automixer detects the mics that are in use and
automatically optimizes the gain distribution, maintaining a consistent system gain
between multiple mics without requiring an engineer to be constantly adjusting the faders.
The Dugan Automixer provided on the MRX can automatically adjust the automix gain
for up to 24 mics used for speech.
In this explanation, we describe using the Dugan Automixer with three mics.
When one person is speaking When two people are speaking
Mic input audio (dB)
Automix gain (dB)
Mic input audio (dB)
Automix gain (dB)
When one person speaks, the gain of that mic
instantly rises, and the gain of the other mics
decreases. The same thing happens when a
different person speaks.
When two people speak simultaneously, the
gain is automatically distributed between the
two mics so that the total gain remains constant,
and the gain of the remaining mic decreases.