Clip Restoration - Adobe 22011292 - Audition User Manual

CHAPTER 8
166
Effects Menu – Edit View

Clip Restoration

Adobe Audition's Clip Restoration filter can remove the evil occurrences of clipping from your waveform. It does this by
actually "filling in" the clipped segments of the waveform.
Clip Restoration dialog
Clipping is a phenomenon that occurs in digital audio when the amplitude value of a signal exceeds the maximum level
that can be represented by the current bit resolution (i.e., 256 steps in 8-bit audio). This can happen when your source
recording levels are simply too high. Clipping causes the signal to distort, and appears in the waveform display as a
"chopping-off " of the top or bottom of the waveform. The audible result is a static-like distortion.
Note: Don't use DC Bias Adjust on any audio you wish to run the Clip Restoration filter on, because DC bias adjusted
material modifies the clipped area and makes it unrecognizable as being clipped. (You can do a DC adjust after de-clipping,
of course.)
Note: You can monitor clipping occurrence during recording or playback by watching the level meters under the waveform
display. If clipping occurs, the box(es) on the far right of the level meters will light up.
Input Attenuation
This is the amount of play there is, measured in percentage, for detecting clipped regions. A value of zero will
Overhead
consider only perfectly horizontal line-type clipping to be "clipped." A value of 1% will allow the horizontal line to vary
up to 1% away from maximum amplitude.
Values of about 1% work best since they catch almost everything, which leads to a more thorough repair.
Minimum Run Size
all samples that seem to be clipped, while a value of 2 won't fix a clipped sample if it's not followed or preceded by another
clipped sample.
This parameter, measured in dB, specifies the amount to amplify the signal by before processing.
This value specifies the length of the shortest run of clipped samples to fix. A value of 1 will fix