Noise Reduction; Automatic Gain Control (Agc); Delay; Compressor - Shure MXA902 Manual

High: Use to provide the strongest echo reduction in rooms with bad acoustics, or in situations where the echo path fre­
quently changes.
Choose the Right NLP Setting
If far-end callers hear echo, test different NLP settings to find one that works. In general, it's best to use the lowest NLP setting
that removes echo from your mic signal.
The level of the MXA902's loudspeaker can also affect how well the AEC removes the reference signal from the mic's signal.
Experiment with using a higher NLP setting when the loudspeaker level is higher.

Noise Reduction

Noise reduction significantly reduces the amount of background noise in your signal caused by projectors, HVAC systems, or
other environmental sources. It is a dynamic processor, which calculates the noise floor in the room and removes noise
throughout the entire spectrum with maximum transparency.
Settings
The noise reduction setting (low, medium, or high) represents the amount of reduction in dB. Use the lowest possible setting
that effectively lowers noise in the room.

Automatic Gain Control (AGC)

Automatic gain control automatically adjusts channel levels to ensure consistent volume for all talkers in all scenarios. For qui­
eter voices, it increases gain. For louder voices, it attenuates the signal.
Enable AGC on channels where the distance between the talker and the microphone may vary, or in rooms where many differ­
ent people will use the conferencing system.
Automatic gain control happens post-gate (after the automixer) and does not affect when the automixer gates on or off.
Target Level (dBFS)
Use −37 dBFS as a starting point to ensure adequate headroom and adjust if necessary. This represents the RMS (aver­
age) level, which is different from setting the input fader according to peak levels to avoid clipping.
Maximum Boost ( dB)
Sets the maximum amount of gain that can be applied
Maximum Cut ( dB)
Sets the maximum attenuation that can be applied
Tip: Use the boost/cut meter (not available on all microphones) to monitor the amount of gain added or subtracted from the
signal. If the meter is always reaching the maximum boost or cut level, adjust the input fader so the signal is closer to the target
level.

Delay

Use delay to synchronize audio and video. When a video system introduces latency (where you hear someone speak, and
their mouth moves later), add delay to align audio and video.
Delay is measured in milliseconds. If there is a significant difference between audio and video, start by using larger intervals of
delay time (500-1000 ms). When the audio and video are slightly out of sync, use smaller intervals to fine-tune.

Compressor

Use the compressor to control the dynamic range of the selected signal.
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