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Gate
Description
Each of the twelve DX1208 Input Channels is equipped with a Gate that occurs between the
input Fader and the Compressor in the DX1208 signal
eliminate unwanted background noise from an input (typically a microphone input) when the
source is not on-mic. For example, in a theater production with many performers using
wireless microphones, Gates may be employed on each actor to reduce the amount of stage
noise picked up by the microphone when the actor is not speaking, thereby improving speech
intelligibility and increasing the gain before feed back of the system. Gates accomplish this
task by effectively acting as volume-dependent mute switches: when the signal volume
exceeds a defined threshold, then the gate 'opens' (is unmuted), and the signal passes
unaffected. When the volume drops below the threshold, the gate 'closes' and the gain is
reduced by an amount defined by the depth setting. Depth settings range anywhere from a
few dB to -100 dB (equivalent to a hard mute). The rate at which the gain is changed between
unity and depth is determined by the attack and release settings. The transfer curve of a
DX1208 Gate with a Threshold of [-10] and a Depth of [20 dB] is shown below.
Some commercial sound processors using gating techniques to perform automixing. The
DX1208 employs a different automixing technique based on gain-sharing. Both techniques
have their relative strengths and drawbacks. However, when properly configured, the Gates
Input Channels routed to the soloed Outputs are also soloed, or
they will not be heard.
chain.
Gates are designed to reduce or
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