TANDBERG 8000 MXP
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4.5.5 Audio Levelling (AGC)
On Select On to allow automatic adjustments (Automatic Gain Control) of audio levels.
When On, the AGC maintains the audio signal level at a fixed value by attenuating
strong signals and am plifying weak signals. Very weak signals, i.e. noise alone, will
not be amplified.
Off Audio leveling is not activated.
Note that to ensure correct behavior of the AGC, it is crucial that the levels on the input
connectors are adjusted correctly using the audio input level settings. The AGC will not
compensate for severe maladju stment of input levels.
When applying a weak signal in the pre sence of strong background noise, the AGC might am plify
the background noise a s well as the si gnal. Therefore, in noisy environments, it is advisable to
turn the AGC off.
Example:
In most conferences, the participants will speak at different levels, and be at different
distances from the microp hones. As a result, some of the participants would be harder to hear
than others. The AGC correct s this problem by automatically increasing the microphone levels
when “quiet” or “di stant” people speak, and by decreasing the microphone levels when
“louder” people spe ak.