Once the signal reaches levels above the THRESHOLD, the gate opens allowing the signal through at full level. Gates are very useful on drums and percussive instruments too. This type of function is useful for suppressing unwanted background noises, such as tape hiss, where the wanted signal is well defined. The gate acts like a switch, where signals below the THRESHOLD setting are attenuated, according the the RANGE control setting. This technique allows very accurate control of the audio levels by generating totally precise control signals, thus preserving audio quality. (The amount of delay is virtually insignificant, and can be compensated for, in order that all signal paths are aligned, in any case.) This delay allows time for the side-chain control signal to be generated so that it can coincide exactly with the signal it will control. In this case, a tiny delay is introduced into the signal path. The type of architecture in the Oxford Dynamics uses feed-forward techniques. The 5.1 Buss Compressor does not include gating and and expansion, but as an additionally has a Sub Filter section. The amount of processing necessary to allow a detector for each process would be far too great for current processor capabilities, if done correctly.
Therefore, to aid operation, there is separate page of controls for each process, since it would not be feasible to have all controls and displays available on a single page.Īlthough there are four gain level controlling processes, Gate, Expander, Compressor and Limiter in the mono and stereo plug-ins, their control signals are all derived from a single side-chain detector, operating on a single gain control element. The Oxford Dynamics plug-in is a highly sophisticated device with comprehensive control of many parameters.
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