Ecler ECLERNET MANAGER - Manual (Page 153)

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8.7. AUTOMIXER Section
AUTOMIXER is a new section, available only in MIMO88CONF, that allows you to perform automatic
mixing of incoming audio signals, while maintaining a control (also automatic) on the total gain of the mix
and managing some parameters and priorities between these signals.
The AUTOMIXER processing module uses a very sophisticated algorithm to manage what input signals
must be part of the automatic mix and under what conditions, and what signals must remain apart. The
AUTOMIXER analyses the audio content on all inputs to identify what should be considered as
background noise and what should be considered as a valid signal to trigger the input channel in the
auto mix.
A clear and frequent example would be a conference application in a room with multiple microphones
assigned to the automatic mixing process as sound sources. The signals simultaneously captured by all
the microphones with a less high intensity could be considered as indirect, i.e. coming from a lecturer
with the intention to be picked up by his own microphone, but inevitably also captured by the rest of the
microphones in the room. In contrast, the signal picked up by the microphone of the speaker itself should
logically be of much greater intensity.
The algorithm takes into account a large set of parameters related to the indirect signals to calculate in
real time the background noise level of the mix and, from there, allows the signals exceeding some
magnitude (set with the THRESHOLD setting) to enter and be part of the automatic mix. Inputs that do
not meet the requirements to be considered as part of the automatic mix are attenuated by an amount of
decibels set with the DEPTH parameter (in certain applications it is preferable not to completely mute
signals excluded from the automatic mix, but to attenuate them to a certain extent).