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Installation ~ LCD Programming
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Maximum Number of Mics
This parameter sets the maximum number of microphones that can be gated on at
any one time. This range can be set from one to eight microphones or off. The default
setting is four. To set the maximum number of microphones, scroll through the
number ranges (one through eight), select the desired number, and press Enter.
First Mic Priority
This feature helps maintain maximum audio intelligibility by allowing only one
microphone to gate on when a person is speaking. ClearOne recommends leaving this
setting on. When turned off, usually two or more microphones gate on when only one
person speaks. However, when this parameter is turned on, one person will usually be
able to gate on only one microphone. First Mic Priority works by determining the
audio level received by all microphones when the first microphone is gated on. This
audio level is then used as the ambient level for all other microphones. This mode can
be turned on (default) or off by selecting the option and pressing Enter.
Last Mic Mode
There are three modes of last-mic operation: last on, mic 1 and off. Last On leaves
the microphone that was activated last full on until another microphone input is
gated on. Mic 1 allows the AP800 to revert back to a mic 1 input when all
microphones gate off. The default setting for last mic mode is off. Select the setting
you want to use and press Enter.
Gate Ratio
The gate ratio specifies how much louder the microphone audio level must be above
the ambient level before a microphone gates on. Remember, this value is relative to
the ambient level. If adaptive ambient mode is on, the actual On threshold changes as
the ambient level changes. The adjustment range is from 0–50dB, in 1dB increments.
Default setting is 15. If microphones frequently gate on when no one is speaking,
increase the gate ratio.
Off Attenuation
This sets the amount of level reduction applied to a microphone when it is off (see
Figure 2.9). Low values increase the amount of echo and reverberation allowed into
the system. If the value is set high, you might be able to hear the microphones gate
on and off as the background noise is reduced. The adjustment range is from
0–50dB, in 1dB increments. Default setting is 12. As more microphones are added to
the system, the off attenuation should be adjusted toward 50 (high).