Mackie Quad Gate, Руководство пользователя

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14
QUAD COMP/GATE
QUAD-C
OMP
/
GA
TE
15
Owner’s Manual
Owner’
s Manual
22. RELEASE knob
In gate mode, this knob adjusts the amount of time for
the gate to close and begin attenuation, after the signal
drops below the threshold and the hold time has passed.
Use this knob to adjust the Release time from 50 ms
to 3 seconds (fully clockwise).
23. HOLD knob
This adjusts the amount of time the gate stays open
for, after the signal drops below the threshold, and
before attenuation begins.
Use this knob to adjust the Hold time from 0 ms to
5 seconds (fully clockwise).
24. RANGE knob
If the EXP button is pressed, this knob is disabled and
has no effect. Otherwise:
This allows you to set the amount of attenuation that
occurs when the signal drops below the threshold.
Use this knob to adjust the Range from 0 dB to 60 dB
(fully clockwise). For example, if you set it to 10 dB, all
signals lower than the threshold will be reduced 10 dB.
25. BYPASS button
Press this button to bypass the currently selected
channel’s gate processor (A, B, C, or D). The signals
then pass merrily on their way into the compressor.
(This does not affect the Gain Reduction metering.)
Gate Key Filters
The gate’s detector circuit receives a copy of the
incoming signals, detects when gating should occur, and
applies the gating and all its parameters to the incom-
ing signals.
When the key filter ON button is engaged, the key
filter is placed before the detector, so you can adjust the
signals reaching the detector, and remove any signals
which may cause false triggering. (The low-pass and
high-pass filters are only applied to the signal going to
the detector and not to the main audio output.)
26. ON button
This button engages or disengages the key filter
circuit. This allows you to quickly compare the action of
the key filter on gating.
When this button is out, the key filter knobs will have
no effect on the gate.
27. HP FREQ knob
The gate key filter high-pass filter employs a 12 dB
per octave Linkwitz-Riley design. This knob allows you
to adjust the key filter’s cutoff frequency from 20 Hz to
5 kHz.
Any frequencies lower than the setting will be attenu-
ated, and play less part in the gating and noise reduc-
tion. Press this knob for 2 seconds to listen to the key
filter and select the best setting of this control.
28. LP FREQ knob
The gate key filter low-pass filter employs a 12 dB per
octave Linkwitz-Riley design. This knob allows you to
adjust the key filter’s cutoff frequency from 1 kHz to 20
kHz.
Any frequencies higher than the setting will be at-
tenuated, and play less part in the gating and noise
reduction. Press this knob for 2 seconds to listen to the
key filter and select the best setting of this control.
Gate Key Filter listen
Pressing and holding either key filter knob for 2
seconds will illuminate the bottom amber LED of the
knob, and place the channel in key filter listen mode.
The channel will output only the key filtered signal and
allow you to quickly identify target frequencies by ear.
For an example of how to use key filter, suppose you
have the Quad Comp/Gate connected using channel in-
serts (as in figure 1 on page 6). It receives the individu-
al channel signals and sends them back to your mixer:
1. On your mixer, remove the channel from the
main mix.
2. Solo that channel to the headphones.
3. Engage the key listen by pressing and hold-
ing either of the key filter knobs on the Quad
Comp/Gate.
4. Use the HPF and LPF controls to remove un-
wanted frequencies false-triggering the gate.
5. Make appropriate gate parameter adjustments.
6. Disengage the key listen.
7. Bring the signal back into the mix.
INPUT
OUTPUT
LEVEL DETECTOR
AND CONTROLS KEY FILTER
HPF LPF