Output gain
Adjusts the output gain after the compressor/limiter circuit. This parameter can be adjusted
automatically when the “Auto output” switch is on. In this case, the output gain is adjusted
automatically to keep approximately the same loudness when the input gain parameter is
changed.
Meters switch
Switch the meter to show the input or output signal level or the amount of the gain reduction.
Display area
High Pass Filter
There is a high-pass filter connected in the circuit in the compressor mode with around
100Hz cut-off frequency and 6dB/octave slope. Although this filter helps to create the unique
sound of the U73b compressor, the bass roll-off might not be suitable for all instruments
when mixing, or for all genres when U73b is used for mastering. We have added an extra
control to switch this filter off. In the limiter mode, this filter is permanently turned off
regardless of the parameter setting.
Key Input
Selects the signal source used for controlling the gain
reduction.
Click to the display item “Key Input” to set the following
modes:
1. Individual – each of the stereo channels is controlled by
itself.
2. Left – both stereo channels are controlled by the left channel input.
3. Right – both stereo channels are controlled by the right channel input.
4. Left+Right – both stereo channels are controlled by the sum of left and right channel
inputs.
5. External Sidechain – select this option to control the compression of an audio signal in
the given track with an audio signal from another track. This can be used, for example, to
create a “ducking” effect or to control the compression of a bass guitar with a kick drum
recorded in another track. The external track can be both mono and stereo (stereo not
supported by the AAX format). In the case of the stereo external side chain, the left
external side chain channel controls the compression of the left compressor channel and
similarly the right external side chain channel controls the compression of the right
compressor channel. To enable this feature, the DAW must be set for side chaining and
must support the side chaining, otherwise this option is disabled. When the DAW side
chaining is disabled during plug-in life, the external side chain is switched to the standard
plug-in input. Please refer to the user manual of your DAW to set up the side chaining in
your DAW.
