X4

Audio editing 177
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Denoiser
The Denoiser removes persistent background noise like computer hum,
hissing, noises from sound charts, disturbance from ground circuits,
interference from audio equipment with high-impedance outputs (such as
record players), impact noise, or the turntable rumble.
The Denoiser requires a noise sample. Some typical noise sounds are included
in the "Preset" selection menu.
Set the degree to which the noise should be reduced with the fader. It is often
better to reduce interference signals by 3-6 dB rather than as much as is
possible in order to keep the sound "natural".
A different option consists of creating a noise sample yourself. All that's
needed is a short section from the audio track in which the distortion can be
found. To get it, switch to the DeNoiser dialog by pressing "Advanced".
DeNoiser – Advanced settings
Step 1: Choose a noise sample
First of all, a sample of the distortion you wish to remove must be selected, i.e.
a so-called "noise sample".
You have two options to choose from:
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.