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CHP. 10 PROCESSING AUDIO
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If values have never been calculated, two dashes display. Click Scan Levels to calculate values.
Note:
If the RMS level never reaches the Ignore below
threshold, a value of -96 dB displays. If this occurs, decrease
the Ignore below threshold level and rescan.
Use current scan level (do not scan selection)
When you select the Use current scan level check box, Sound Forge uses the current scan levels without
initiating a new scan. This is useful when applying scan levels from a different selection or file to the current
selection, thereby allowing identical gains to be applied to multiple files. This option can also be used to
scan a selection of an audio file containing the loudest or most constant levels and then apply that scan to
normalize the entire file.
If clipping occurs
The If clipping occurs drop-down list is used to specify how the normalize function handles clipping that may
occur when an audio file is processed using the
RMS option. This list provides four options.
Note:
When normalizing stereo audio, normalization is
computed on the loudest sample value found in either channel
and identical gain is applied to both channels. If a single
channel is selected in a stereo file, normalization processes
only that channel.
Pan/Expand
Pan/Expand allows you to create panning effects and stereo compression/expansion in selections.
Note:
The Expand option is only available in the full version
of Sound Forge.
Option Description
Apply dynamic
compression
Audio peaks that will result in clipping are limited below 0 dB using non-zero attack and
release times to minimize distortion. This mode is useful for getting loud and clear audio
during mastering.
Normalize peak value to
0dB
The selection’s peak amplitude level is normalized to 0 dB, thereby allowing the
maximum possible constant gain without clipping the selection. However, less gain is
applied than would be necessary to achieve the Normalize to RMS level.
Ignore (saturate) Audio is permitted to clip and distort.
Stop processing Audio peaks that will result in clipping force the normalize function to cease processing
and alert you that clipping will occur at the current level.
Nonexistent Peak and RMS levels