Specifications

An automatic mixer must be considered whenever
multiple microphones (four or more) are being used,
particularly if the sound system is intended to run hands-
free, that is, without a live operator. Microphones should be
selected and placed according to the guidelines previously
discussed. Automatic mixer systems with integrated
microphones require a choice from the microphone models
available for those systems. It is recommended that the
manufacturer or a qualified sound contractor be consulted
on the details of a particular automatic mixer.
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MEETING FACILITIES
Audio Systems Guide for
Kentucky State House
Scott Air Force Base
Summary of automatic mixer benefits
• The primary function of an automatic mixer
is to keep unused microphones turned off
and to instantaneously activate microphones
when needed.
• Using an automatic mixer will:
- Improve gain before feedback
- Reduce audio degradation caused by
superfluous open microphones
- Control the build-up of background noise
• Keeping the number of open microphones
to a minimum always improves overall audio
and quality
• The additional control circuitry on automatic
mixers provide a variety of additional
functions like:
- Audio privacy switches
- Chairperson control of all microphones
- Illuminated indicators of microphone status
- Automatic video camera selection based
on microphone activation