User Guide

3.1.3 Bass Cut/Nor
Determines the frequency response of the level detector circuit. Set to NORMAL to match the frequency
response to the gain control section. Set to BASS CUT to attenuate bass signals and reduce their effect
on the overall compression/expansion operations.
3.1.4 Attack Time
Determines the time in which the system responds to a change in input level. Assuming a 10 dB step
increment in input level, the attack time is numerically equal to the time required for the level detector
to reach its final state with respect to the new input level.
3.1.5 Release Time
Determines the time in which the system responds to a decrease in input level. Assuming a 10 dB step
increment in input level, the attack time is numerically equal to the time required for the level detector
to reach its final state with respect to the new input level.
3.1.6 Meter Function
Allows you to select meter monitoring of Input, relative Gain or Output. These functions control only
the meter display – they have no effect on the signal processing. All level readings are in dBFS.
3.1.7 Function
This is the main Omnipressor control. When set fully counterclockwise, gain varies sharply from full
attenuation to maximum gain as the Input Threshold is exceeded. As the control is rotated clockwise,
this action becomes less sharp until the gain varies only a few dB from no input to full input. At the
knob’s centerpoint, the gain is constant, regardless of input level. As the knob is turned clockwise, gain
begins decreasing with increasing input level. More rotation produces substantial compression until the
point of infinite compression is reached and the gain decreases 1 dB for each dB of signal increase, thus
keeping the output level constant regardless of input. Rotation past this point produces dynamic reversal,
in which a high level input produces a lower output than does a low level input. Full clockwise rotation
results in full output attenuation above the Input Threshold. Two LEDs alert you to the gain state of
the Omnipressor. A green ATTEN LED illuminates to indicate that the Omnipressor is in gain reduction
mode. A red GAIN LED illuminates in gain increase mode. Relative brightness of the LEDs indicates the
amount of gain reduction or increase. Operation of these LEDs is instantaneous, so that peak limiting is
indicated even when the meter has insufficient time to respond.
3.1.8 Output/Cal
These switches allow you to increase the output level of the Omnipressor without affecting compression
ratios or other operating parameters. This is useful, for example, when the unit is being used in extreme
modes of compression or dynamic reversal, and the input signal is large enough to cause large amounts
of consistent gain reduction. In such cases, you can select to increase the gain of the output stage by
selecting +10dB, +20 dB, or both for 30 dB of Gain.
3.1.9 Atten Limit
Limits the maximum attenuation of the Omnipressor from 30 dB to approximately 1dB. This control
overrides the action of FUNCTION.
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