Gate
Square ONE Dynamics
29
Release
Release is the time taken for the gate to close after the programme material falls back below threshold. The
shape is crucial to the sound and has been tailored to produce the most transparent possible gating action.
Range
Controls the amount of gain reduction that is applied to signals below threshold. Although the gain reduction
can be infinite, it is often better to back it off slightly. With this type of setting the background noise and spill
remain relatively constant and become less noticeable because they do not switch in and out with the gate.
Intelligent threshold shift (i-TS)
i-TS operates in conjunction with
GATE HOLD
(see Item 18 on page 13) to reduce
chattering
within the
gate. Chattering is the undesirable condition that occurs when signals - especially low frequency ones - are
very close to the gate threshold. In this situation the gate can become indecisive and repeatedly open and
shut on the programme. i-TS ensures that the gate remains open by automatically adjusting the threshold
downwards as the signal goes over threshold. When the signal actually falls below threshold (that is, the
temporarily adjusted threshold) the i-TS resets, ready for the next gate opening. This improved decision-
making ensures that gating is rock solid and attacks start instantly and consistently, even on signals that go
slightly over threshold.
i-TS is particularly useful for low frequency material and instruments with oscillating or unpredictable decay
envelopes.
Music PA
The more microphones (mics) there are in a public address (PA) system, the more background noise and
stage clutter will be picked up and amplified unless noise gating is used. The most significant improvement
in clarity will be obtained by gating those microphones that are used least often, for example the mic used
only occasionally by a backing vocalist.
Microphones used at a fairly high gain setting, for example, on a string section, will pick up a lot of
background noise. These should be gated too, to improve PA clarity.
Noise gates on the drum mics will also improve the sound of the kit.
Conference PA
In a conference or business presentation PA system, there may be several microphones in use
simultaneously. Since each microphone is placed at some distance from the speaker's mouth, the gain
setting on the console will be quite high. Background noise, such as outside traffic or air conditioning, will be
picked up and amplified, causing a considerable reduction in the signal to noise ratio of the system. The
solution is to gate each microphone individually using the Square ONE Dynamics.
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