Soundtrack Pro 3 Effects Reference (en).pdf - Help Library - Apple

Specialized Effects and Utilities 12
Soundtrack Pro includes a bundle of specialized effects and utilities designed to address
tasks often encountered during audio production. See the section for each processor for
typical usage.
This chapter covers the following:
• DeEsser (p. 153)
• Denoiser (p. 155)
• Exciter (p. 157)
• SubBass (p. 158)
DeEsser
The DeEsser is a frequency-specific compressor, designed to compress a particular
frequency band within a complex audio signal. It is used to eliminate hiss (also called
sibilance) from the signal.
The advantage of using the DeEsser rather than an EQ to cut high frequencies is that it
compresses the signal dynamically, rather than statically. This prevents the sound from
becoming darker when no sibilance is present in the signal. The DeEsser has extremely
fast attack and release times.
When using the DeEsser, you can set the frequency range being compressed (the
Suppressor frequency) independently of the frequency range being analyzed (the Detector
frequency). The two ranges can be easily compared in the DeEsser’s Detector and
Suppressor frequency range displays.
The Suppressor frequency range is reduced in level for as long as the Detector frequency
threshold is exceeded.
The DeEsser does not use a frequency-dividing network—a crossover utilizing lowpass
and highpass filters. Rather, it isolates and subtracts the frequency band, resulting in no
alteration of the phase curve.
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