Filters section, 5 filters section – Sonnox Oxford SuprEsser User Manual
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4.1 BasicScreenControls
4 DESCRIPTION OF CONTROLS
OUTSIDE Button
This sets the crossfade so that you are listening only to the output of the band-reject
filter — which is everything outside of the bandpass window, hence the name. In
this mode, if you sweep the centre frequency of the band filter up and down the
spectrum, the troublesome noises will disappear when you have hit the area to work
on.
4.1.5 FILTERS Section
This section allows you to speficy the filter characteristics:
FREQUENCY faderandtouchPad
The horizontal fader below the graphical display, and its associated touch pad in the
Filters section, control and display the centre frequency of the bandpass and
band-reject filter pair. The control range goes all the way down to 20Hz to allow for
low frequency treatment as well as mid and high frequency treatment. The centre
frequency of the band filters can also be changed on the graph itself by dragging
(horizontally) the yellow ‘centre’ symbol at the top of the display. See Section 3.3
Graphical Screen Controls if you are unclear about the location of this latter control.
When the low edge of the bandpass filter reaches 20Hz, the plug-in switches over to
using just the high-edge crossover, which means the bandpass window extends all
the way down to DC, providing a new useful mode. See 2.3 Advanced Operational
Modes for more information.
WIDTH TouchPad
This controls, in octaves, the width of the bandpass and band-reject filter pair. The
control range is wide enough to allow almost the entire spectrum from 20Hz to
20kHz. You can also change the filter width, also relative to its centre point, with
vertical drags of the graph’s yellow centre, or by dragging horizontally on the filter’s
upper or lower frequency markers (see Section 3.3 Graphical Screen Controls for
more details).
When you reduce the width down to 0.2 octaves, this triggers the bandpass filter to
switch to a new type of filter — a High-Q notch filter. This is useful when a very
narrow frequency band needs removal, such as a whistle at a particular frequency.
See Section 2.3 Advanced Operational Modes for more information.
SLOPE/Q TouchPad
This controls the slope of the filters used to implement the bandpass and band-reject