Creative 70EM896106000 Owners Manual - Page 95

Gate This parameter enables automatic gain reduction on signals that fall from 1 to 120dB below the Threshold point (or Soft Knee threshold, if enabled.) This can act effectively as a "noise gate" on low-level signals that have been boosted by the action of the Gain or Soft Knee parameters. The gating action follows a somewhat soft-kneed contour of its own so that turn-on and turn-off at the gate threshold is not too abrupt. Gate 0dB -10dB -20dB -30dB Threshold: -20dB Ratio = 4:1 Gain = +15dB Gate Threshold -30dB -40dB -50dB -60dB -70dB -80dB In this example, the Gain has been boosted by +15dB. The Gate cancels out the +15dB Gain boost below the Gate Threshold. Signal levels above the Gate Threshold will be boosted; signal levels below this point will not be boosted and will be 15dB lower in volume. Note that, strictly speaking, the term "gate" is a misnomer in this context, since the action of this parameter is simply to cancel out gain increases that resulted from the settings of other parameters. This can be seen by the arrows in the diagram as the gain is reduced below the Gate threshold back down to the dotted line representing unity gain. The result is that if the Gain parameter is set negative or the Soft Knee parameter is disabled, the Gate parameter will have no effect. Comp Lookahead/Delay This parameter controls compressor lookahead or delay by setting the relative time offset, in milliseconds, between the compressor's signal path and its sidechain path. At negative values, this parameter lets the level detector in the compressor's sidechain "look into the future" up to 100 milliseconds in order to anticipate upcoming peaks in the signal accomplished of course, by inserting delay into the signal path. This lookahead technique allows the use of slower attack times without missing signal peaks. Lookahead Delay Sharp waveform peak is missed by compressor. Add Lookahead (neg values) to compress peak. Add Delay (pos values) to allow peak through. At positive values, the signal path delay is zero; instead, a delay of up to 50 milliseconds is inserted into the sidechain path containing the level detector. This delay can be used intentionally to cause the compressor to miss signal peaks, retaining the E-MU PCIe Digital Audio Systems 5 - Effects Core Effects Descriptions 95