dbx SC 32, Help Manual

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SC32/SC64 Help
178
Input Gate - SC 32 / SC 64
Gate - A fixed "infinite" downward expansion ratio. Used extensively for
controlling unwanted noise, such as preventing "open" microphones from
introducing extraneous sounds into an audio system. When the incoming audio
signal drops below the user set-point (the threshold point) the expander prevents
any further output by reducing the gain to "zero".
On/Off Button - Turns the Gate on and off; when in the Off position, the signal
path bypasses this algorithm.
Threshold Fader - The Threshold fader sets the level at which the gate opens.
Anything above the Threshold passes, while signal that is lower than the
Threshold is attenuated. Beware, setting the Threshold to high can cut off the tail
end of signals as they fade out (the sustain of a guitar note, a held piano chord, a
reverb tail, etc.).
Ratio Fader - This is where you decide how much downward expansion you
want. This Ratio works opposite from that of the compressor or limiter. If a ratio
of 1:4 is selected, a signal that is 1dB below the Threshold will be reduced in gain
so that the resultant signal is 4dB below the Threshold.