Shure MXA710 - Intellimix DSP; DSP Best Practices; Acoustic Echo Cancellation

Shure Incorporated
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For best results:
Use only 1 layer of fabric over the microphone or mounting hardware.
Always confirm the fabric's acoustic specifications and testing process with the fabric manufacturer. Shure doesn't keep
track of any changes in fabric specifications.
IntelliMix DSP
This device contains IntelliMix digital signal processing blocks that can be applied to the automix channel output. The DSP
blocks include:
Acoustic echo cancellation (AEC)
Automatic gain control (AGC)
Noise reduction
Compressor
Delay
To access the DSP blocks, select the IntelliMix tab. When enabled, each DSP block will be colored.
Selecting Bypass IntelliMix will bypass the following DSP blocks: AEC, AGC, noise reduction, compressor, and delay.
DSP Best Practices
Apply DSP blocks only as needed. Run a test of your system without DSP, and then add processing as needed to fix any
issues that you hear in the audio signal.
Unless you encounter video that lags behind audio, set Delay to off.
DSP blocks do not affect whether the automixer gates a channel on or off.
Acoustic Echo Cancellation
In audio conferencing, a far-end talker may hear their voice echo as a result of a near-end microphone capturing audio from
loudspeakers. Acoustic echo cancellation (AEC) is a DSP algorithm which identifies the far-end signal and stops it from being
captured by the microphone to deliver clear, uninterrupted speech. During a conference call, the AEC works constantly to opti
mize processing while far-end audio is present.
When possible, optimize the acoustic environment using the following tips:
Reduce loudspeaker volume
Position loudspeakers farther from microphones
Avoid pointing loudspeakers directly at microphone coverage areas
If the microphone is providing AEC on the automix output, turn off AEC on the processor. Designer's auto route applies
these settings automatically.
Select a Reference Signal for AEC
To apply AEC, provide a far end reference signal. For best results, use the signal that also feeds your local reinforcement sys
tem.
P300: Go to Schematic and click any AEC block. Choose the reference source, and the reference source changes for all
AEC blocks.
MXA710, MXA901, MXA910, MXA920: Route a far-end signal to the AEC Reference In channel.
IntelliMix Room: Go to Schematic and click an AEC block. Choose the reference source. Each block can use a different
reference source, so set the reference for each AEC block. When stereo audio is on, you can set different left and right
channel reference sources as needed.