11.0

EFFECTS MENU 531
Remove DC offset (offline)
This function removes the DC offset of a Wave project/object. This can be used when your
sound card overlays a recording of your sample with a constant DC offset, which leads to
clicks during cutting or editing.
Options: Here you can enter a minimum DC offset threshold, which would indicate where
DC offset removal will kick in. If you unclick the corresponding check, stereo channels will
be edited together. This serves to save computational time, especially when working with
long files.
Spectral Cleaning (offline)
Spectral cleaning – the basics
Spectral cleaning removes distortions like coughing, whistling, or isolated clapping from a
recording without influencing the wanted signal.
The graphical interpretation of the music can be seen in the spectral cleaning editor via a
spectrogram. This displays the different frequency levels over time. The volume of
frequencies is visualized via a color code or via its brightness.
Audible distortion noises louder than the wanted signal are usually limited to a certain
frequency spectrum. These are highlighted with colors in the spectrogram. This allows
disturbing signals to be easily located and removed with the mouse tool.
For example, you can recognize a continuous sound from its pattern (consisting of
horizontal lines), since these correspond with the sound components or overtones of the
sound. A distortion with an impulse quality can be recognized by a vertical peak.
Select the disturbances with the drawing tool in the spectral cleaning dialog before you
remove them. So that there is no audible gap, lost components of the original frequency
spectrum from the wanted signal that surrounds the distortion are recalculated into the
recording.