Korg NAUTILUS Series, Parameter Manual, Page: 776 / 961

766
004: St.Multiband Compressor
On-screen graphic, 004 St. Multiband Compressor crossover
This stereo effect divides the input signal into four bands,
low through high, with separate dynamics control of each
band. While it’s named a “compressor,” it’s actually much
more than that. It can be used as a compressor, expander,
gate, or EQ–with each band performing a different function,
if desired.
The dynamics processing works somewhat differently than a
standard compressor/expander. For more information, see
“Range [dB],” below.
XOVER FILTER
Slope [6dB Oct, 12dB Oct, 18dB Oct, 24dB Oct]
Selects the steepness of the crossover filters.
Frequency 1-2 [Hz] [40…240]
Sets the frequency at which bands 1 and 2 are divided.
Frequency 2-3 [Hz] [100…6.00k]
Sets the frequency at which bands 2 and 3 are divided.
Frequency 3-4 [Hz] [2.00k…16.00k]
Sets the frequency at which bands 3 and 4 are divided.
ADJUST
Knee [Soft, 0.01…0.74, Hard]
This effectively controls both the onset/offset shape of the
dynamics processing, and (in conjunction with
Range ), the
compression/expansion ratio.
For more information, see “Range [dB],” below.
Output Gain [dB] [–18.0…+18.0]
Sets the overall output gain.
Bands 1-4
Each of the four bands has identical parameters.
Solo [Check-box]
Use this setting to audition the processed sound of each
band.
If this is On, the output of other bands will be muted. If this
is On for more than one band, only the bands for which this
is On will be heard. Normally, this should be turned Off for
all bands.
Bypass [Check-box]
You can bypass compression for each band individually.
When this is On, you’ll hear the band’s un-compressed
signal.
Threshold [dB] [–80.0…0.0]
The compression/expansion functions only in a range around
the
Threshold level. Signals outside of this range are not
affected.
For more information, see “Range [dB],” below.
Range [dB] [–24.0…+18.0]
The combination of Threshold and Range controls the
band’s basic functionality (traditional compressor, low-level
expander, etc.), and the combination of
Range and Knee
creates the band’s compression/expansion.
To create a traditional compressor action, set the Threshold
around 0.0, and the Range to a negative value.
To create a low-level expander (raising lower volume levels,
while leaving higher levels untouched), set the
Threshold to
a low level, and the Range to a positive value.
Vertical axis: Gain (dB)
Horizontal axis: Cutoff frequency (Hz)
This shows an approximation of each
band’s frequency response.
Red lines indicate the crossover points.
Band1 Band2 Band3 Band4
Crossover between bands 1 and 2
Crossover between bands 2 and 3
Crossover between bands 3 and 4
Left
Right
Wet / Dry
Gain
Wet / Dry
Stereo In - Stereo Out
4-way Crossover
4-way Crossover
+
+
+
+
Compressor
Compressor
Compressor
Compressor
Compressor
Compressor
Compressor
Compressor
Envelope Control
Envelope Control
Envelope Control
Envelope Control
These meters show the band’s
input level and gain reduction, in
real-time. The red mark shows the
Threshold setting.