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Table Of Contents
84 Cleaning
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It's often better to reduce interference signals by 3 to 6 dB rather than as
much as is possible to keep the sound "natural". For buzzing, it’s best to apply
complete removal.
Adaptive: The value for the "Noise level" parameter is set automatically by
setting the level of the hiss present in the signal. The advantage of this is that if
a distortion is not constant, the noise level always adapts to the current
distortion. If the noise sample is not calculated from the signal that is to be
edited, but rather uses a preset to do so, the difference between the strength
of the distortion in the audio material and in the noise sample will be equalized
automatically. If the noise sample has been calculated from the signal being
edited and the distortion is constant, then the "Adaptive" setting should not be
used.
Removed noise: The part of music that was filtered out by the DeNoiser can
be previewed for testing purposes.
DeRumble: Here you can activate a special filter for deep-frequency rumbling
noises. Examples of such distortions are mechanical noises from old record
players, wind, and subsonic noises in microphone recordings.
Preset: All the DeNoiser's settings, i.e. the noise sample applied and the
settings of the processing section can be saved as a preset for later use.
Artefacts
With incorrect settings, the DeNoiser and the DeHisser may leave behind a
metallic chirping or twittering sound, the so-called artefact noise. The cause of
this is the incomplete removal of the distortion. The ear is quite sensitive to this
sound because of its synthetic character. This problem, in practice, only
occurs in especially difficult cases.
To achieve the best possible results you should pay attention to the following
hints:
First, select a preset from the selection menu. In most cases the result is
satisfactory.
Be careful when "denoising" the effect: Less is more! The distortion sound
should no longer be audible, otherwise artefacts may be brought about.
We recommend removing any DC offset that may exist from the material
before using it ("Effects" menu > Cleaning > "Remove DC offset" (view page
85)).