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Pick out typical background noise: You can select and use a number of typical
background noises from the flip menu. Select one and listen to it by pressing the
"Play" button. If it is similar to the background noise in your sound track, go ahead and
use it (see "Step 2: Removing background noise").
Extract a new noise sample from an audio track: You can also pick out a short
passage (from the existing sound track) in which you can hear the background noise.
Automatic search: Searches especially quiet passages in which background noise is
most noticeable.
Previous / Play / Next: These buttons allow you to play all of the passages found for
easy comparison.
Save as: Once found, you can save noise samples to the hard drive. They then appear
as entries in the "Typical background noises" flip menu to be used in other projects.
If you only wish to use the noise sample in the current project, you don't have to save.
Instead just go to the "Remove noise" category.
Step 2: Removing background noise
Noise level: The level of the noise reduction function should be set as precisely as
possible. Values that are too low are expressed at a low distortion dampening level
and in artifacts, like noises or "twittering" (see below). High settings produce dull
results – useful signals that sound similar to hissing noises are also filtered away. Try
to find the best setting for the project at hand.
Reducer: This sets the balance between the original signal and the signal with the
applied noise reduction. It's often better to reduce interference signals by 3-6 dB
rather than as much as is possible, so as to keep the sound "natural". In case of
buzzing, it’s best to apply complete removal.
Dehisser
The Dehisser eliminates regular "white" noise typically produced by analog tape
recordings, microphone pre-amplifiers, A/D converters, or transformers.
Noise reduction can be regulated in decibels with the fader. It is often better to reduce
interference signals by 3-6 dB rather than as much as possible in order to keep the
sound "natural".
Noise level: You can choose between different noise levels. The level of the noise
reduction function should be set as precisely as possible. Low settings result in
incomplete deletion of the hissing. Incomplete deleting of hissing produces artifacts
and should be avoided, since high settings will produce dull results and some useful
signals (i.e. woodwinds) which are similar to hissing are also filtered away.