User Manual

Table Of Contents
Theory of Automixer operation
Automixer employs the Dugan Speech System, which automatically adjusts the automix gain of up to 64 live
speech microphones.
One person speaking with multiple microphones Two people speaking with multiple microphones
Microphone input
level (dB)
Gain after automix
(dB)
Microphone input
level (dB)
Gain after automix
(dB)
If one person speaks, that microphone’s gain level will fade
up instantly, while the other microphone gains will be
reduced. If a different person speaks, the same effect will be
obtained.
If two people speak, the gain of two microphones will be
automatically distributed so that the total gain will stay
constant. The gain of the third microphone will be reduced.
The behavior of the Dugan Speech System is different than that of a limiter or auto-level controller function.
This system enables an engineer to adjust the level balance as usual, even for multiple speakers. Also, while
no one is speaking, the system detects the microphone input levels and automatically distributes the gain.
So, the faders can be left in a raised position.
Automixer distributes automix gain more preferentially to channels with higher input levels. Therefore, insert
it to POST ON. Automixer provides the following benefits:
It prevents the annoying fluctuation of levels and uneven ambient noise that is input from microphones on
the channels with Channel Off or the minimum fader setting.
It adjusts the gain and fader settings according to the speaker’s voice level on each microphone, and
inputs even signal levels, resulting in more accurate automix gain distribution.
It achieves preferential distribution of automix gain for the speaker you want to emphasize by raising the
fader for that speaker or lowering others.
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GEQ/PEQ/Automixer > Theory of Automixer operation