11.0

EFFECTS MENU 517
De-clipper
(Samplitude Pro and Samplitude - without Cleaning and restoration Suite)
Samplitude contains a special function for dealing with digital clipping and analog
distortions. Using sophisticated algorithms, the overmodulated passages are interpolated
based on audio material surrounding the clipping area. Following this, the entire volume of
the material can be reduced so that the interpolated parts can be played back without
overmodulation. The de-clipping algorithm is suited to material in which the overmodulation
is clearly audible, for example, distorted piano or song voices.
Min number of clipped samples: This parameter defines the minimum encountered
number of consecutive clipped samples before Samplitude's de-clipping algorithm will
repair the distortion. A value of 2 to 5 works well in most instances.
Minimal levelof clipped samples: Here you can enter the level at which the algorithm will
consider a sample to be clipped and correct it. This is important, since different sound
cards display different clipping behavior. Some DAT recorders have a protective analog
switch, so that the level never reaches the digital mains. In this case, a value of -0.5 dB or
less is suitable. With an input of, for example, -6 dB, all samples above half the control level
are registered as overmodulated and recalculated. In this way analogue distorted material
can be improved.
Get level from area height: This function allows setting the de-clipping level from the
height of the selected area in the WAV project. This is useful when an overmodulated area
has been previously selected exactly, and now has to be repaired.
Number of steady samples after clip: This parameter defines the number of "steady"
samples used to determine the end of the distorted segment. In other words, a number of
samples that follow the distorted section, that remain at a constant level. A number of
lower-end audio cards (e.g. SoundBlaster, and others) produce chaotic values during a
clipped segment. For cleanly cut off peak levels, a value of 1 is sufficient.
Set max level to 0 dB: Here you can specify, if you would like to normalize the material to
0 dB (100%) after de-clipping is finished. This option is recommended when working with
16-bit audio material, since in that case no other level reserve for overmodulation correction
is available. For 24-bit float audio material this option is not necessary, because float format
offers flexible dynamics. This allows you to set the audio levels manually at the end.
De-clicker/De-crackler
(optional as a component of the cleaning/restoration suite for Samplitude Pro and
Samplitude)
The Declicker removes crackling and clicking noises, which are typical on scratched
records.
The Decrackler algorithm has been specifically developed to remove crackling noises,
giving you good results for removing crackling from old records. Loud, individual click
sounds can be removed more easily with the Declicker.