Shure MXA710 - Noise Reduction; Automatic Gain Control (AGC)

Shure Incorporated
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Designer's auto route process automatically routes an AEC reference source. However, you should check that Designer choos
es the reference source you want to use.
Note: Always send an AEC reference signal to microphones with AEC processing, even if you are using a separate DSP for AEC. Designer's auto route fea
ture automatically creates these routes.
AEC Settings
Reference Meter
Use the reference meter to visually verify the reference signal is present. The reference sig
nal should not be clipping.
ERLE
Echo return loss enhancement (ERLE) displays the dB level of signal reduction (the amount
of echo being removed). If the reference source is connected properly, the ERLE meter ac
tivity generally corresponds to the reference meter.
Reference Indicates which channel is serving as the far end reference signal.
Non-Linear Processing
The primary component of the acoustic echo canceller is an adaptive filter. Nonlinear pro
cessing supplements the adaptive filter to remove any residual echo caused by acoustic ir
regularities or changes in the environment. Use the lowest possible setting that is effective in
your room.
Low: Use in rooms with controlled acoustics and minimal echoes. This setting provides the
most natural sound for full duplex.
Medium: Use in typical rooms as a starting point. If you hear echo artifacts, try using the
high setting.
High: Use to provide the strongest echo reduction in rooms with bad acoustics, or in situa
tions where the echo path frequently changes.
Auto (default)*: For best results, use this setting. The nonlinear processing level automati
cally adapts to changes in the acoustic environment.
* Auto setting available in firmware 6.2 and newer for MXA920, MXA902, MXA901, and MXA710
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
Options: Low, medium, high, or auto*
The noise reduction setting reflects the amount of reduction in dB. For best results, use the auto setting so that the noise re
duction level adapts to changes in the acoustic environment.
* Auto setting available in firmware 6.2 and newer for MXA920, MXA902, MXA901, and MXA710
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.