Sonnox Oxford Restore - Manual (Page 28)

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current bias display are not at their null position. A small red or yellow dot appears on the Reset
Bias button to indicate that the non-selected bias curve is non-null.
5.4
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 Cutoff frequency that is safely above the signal content, and
lower the reduction fader according to taste.
5.5
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.
5.6
Mid / Side Mode
Mid-Side channel configuration allows better control over the way a stereo signal degrades to a
mono signal. This is important in broadcast where, for example, a stereo TV program needs to
play correctly on a mono TV, or an FM radio broadcast can degrade to mono in less than perfect
conditions, without phase effects. With a Mid-Side signal, you can simply drop the Side signal to
create the mono signal.
You can convert a Left-Right stereo pair of channels into Mid-Side by adding the two together to
create the Mid signal, and taking the difference to create the Side signal:
Mid = Left + Right
Side = Left - Right
In other words the Mid signal is what is common to both Left and Right, and the Side signal is
what is different between Left and Right. You can achieve this in a DAW host by sending the