ClearOne AP400 - Manual (Page 25)

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Decay Rate
This feature determines how fast a microphone gates off after the hold time expires
(see Figure 2.12). Three options are available for this feature: slow (default),
medium, and fast.
If your room has very low ambient noise, set the value to fast. This reduces
the effects of echo and reverberation. If you hear ambient noise “swoosh down”
while the microphones decay, set this value to either medium or slow.
Manual Ambient
This setting is relevant only if the adaptive ambient mode is off on a mic channel
(see Adaptive Ambient on page 24). Best results are usually achieved when the
adaptive ambient mode is on. However, if you need to set the ambient level to a fixed
value, turn off the adaptive ambient mode on the desired microphone channels. A
manual ambient setting is a global setting and will affect all mics equally which are
set to adaptive ambient off. The ambient level ranges from 0dB to -70dB. The
default setting is -30dB.
To determine ambient level
1. Check your current gate ratio from the Gate Parameters menu. Make a note
of the value. Example: “Gate Ratio: 15.”
2. Select Manual Ambient from the Gate Parameters menu. Press Enter to
change the dB value.
3. Scroll up or down through the dB values until the mic gates on (gating is
indicated when the mic LED lights up). Individual room conditions will
determine whether you need to scroll up or down. When the LED flickers,
the dB value indicated on the LCD display is the ambient level of the room.
4. Deduct the gate ratio value from the ambient level value you have just
determined. For example, if the ambient noise level of the room is identified
as -50dB and the gate ratio is 15, the manual ambient setting would be
-35dB.
Installation ~ LCD Programming
Figure 2.12. Decay rate
Any combination of
channels can be set in
adaptive ambient
or
manual ambient modes. Only
individual channels cannot be set
with both modes active.
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