Manual

4.4 DeHisserSection 4 THE OXFORD DENOISER
yellow. The adjustment of the noise reduction works in all three modes – Auto, Freeze or
Manual. Using this reduction bias curve you can easily reduce the amount of noise
reduction at particularly critical frequencies, for example where piano transients are
brightest and most obvious. This ability to tailor the noise reduction allows for a much
more musical result that shows good noise reduction while also being sympathetic to the
character and ambience of the original.
The Bias: ThresholdReduction select buttons are used to switch between the
ThresholdBias and the ReductionBias. The control of the reduction bias handles is
identical to the control of the threshold handles, which is described above. The Reset
Bias button is lit to show that one or more handles on the current bias display are not at
their null position.
4.4 DeHisserSection
The Oxford DeNoiser also contains a dedicated DeHisser section. This DeHisser is not as
musical as the de-hissing that can be achieved with the de-noiser algorithms, but it does
allow more aggressive reduction of hiss levels. This makes it very useful for dialogue and
movie sound tracks where there is not a lot of high frequency material that needs
preserving, and where the priority is to reduce the hiss to an acceptably clean level.
However, music containing lots of cymbals or other HF content will generally not sound
good using the DeHisser. The DeHisser section is a tool to keep handy for some jobs
where its character is appropriate.
To use the DeHisser, simply select a Cuto frequency that is safely above the signal
content, and lower the reduction fader according to taste.
4.5 Sweetening
Having removed the noise, in some circumstances it is desirable to add something back
to the signal that has been taken away. For example, the act of de-noising can make the
material sound a little flat compared with the original. The Oxford DeNoiser has a Warmth
control in the output section that can quickly add some richness back into the
material.
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