To reduce the dynamic range from the connected speaker:
If some people on the far end are inaudible while others are too loud, check the Compressor box.
To adjust for more natural sound:
Use the equalizer to adjust specific frequency ranges.
To sync the sound with the video in the IP stream:
Check the Delay box and enter a delay value in msec.
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Integrator's Complete Guide to the ConferenceSHOT AV Enterprise-Class Conferencing System