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INPUTS AND OUTPUTS •
INPUTS 1-8 PARAMETERS
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different microphones to sound similar, filter out unwanted hum, etc. You can increase
or decrease each band up to 15dB, in increments of .5dB on each input.
The next option is the automatic gain control (AGC) and speech leveler. The purpose of
the AGC is to automatically increase gain when the level is too low and decrease gain
when it is too high. AGC is provided at all inputs and should be activated for
microphones or line inputs that experience audio level fluctuation. The speech leveler
targets speech audio and equalizes the audio levels of someone who is speaking close
to a mic and someone who is speaking from farther away. For example, if audio coming
from a video codec fluctuates (depending on the connection at the other end), the AGC
will compensate for these differences.
After the channel mute stage, non-gated audio is applied to the routing matrix for
outputs that need direct audio. The final stage (automixing) determines how the audio
is directed into the post-gating input to the routing matrix. Each input can be set for a
variety of automixing functions, including activation settings, chairman mic, and
adaptive ambient mode. The functions determine when, how, and why an individual
microphone will gate on or off:
Microphone Activation. There are two modes of mic activation that can be selected
on a per-input basis: auto-gate and manual gate on/off. In auto-gate mode, the input
channel is voice activated, based on the programmed automixing system parameters.
In manual gate mode, the mic is activated by manually switching it on or off and
allowing the input to contribute to automixing parameters.
Chairman Override (On or Off). Each gated input may be selected as a chairman
override input. This feature adds this input to the chairman override group and, when
gated on, gates off inputs that are not in the chairman override group.
Channel Mute
AGC/SL
a
On/Off
On/Off
Echo
Cancellation
Noise
Cancellation
NLP
Selectable
EC Ref
Selectable
NC Depth
Selectable
AGC
SL
5
Notch
Figure 7. Inputs 1-8 Parameters
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