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Glossary
Dry Used to describe an audio signal without any signal processing such as reverb; the
opposite of Wet.
DSP See “Digital Signal Processing (DSP)” on page 279.
DVD (Digital Video Disc) A storage medium similar to a compact disc (CD), but with
much higher bandwidth and storage capabilities. Audio stored in DVD movies is generally
96 kHz/24-bit.
E
Echo A distinct repetition of a sound, caused by the sound reflecting off a surface. Adobe
Audition offers two echo effects, Echo and Echo Chamber.
8-bit Signed See “8-bit signed (.sam)” on page 232.
Envelopes To automate mixes in Multitrack View, Adobe Audition uses envelopes, which
are drawn directly on clips. Envelopes visually indicate the pan, volume, wet/dry, and
effects parameter settings at any point in a track. For example, when a volume envelope is
at the top of an audio clip, the audio is at full volume; when the envelope is at the bottom,
the audio is at zero volume.
Equalization (EQ) The process of increasing or decreasing the amplitude of specific audio
frequencies relative to the amplitude of other audio frequencies.
Expander Increases dynamic range by lowering amplitude when an audio signal falls
below a specified threshold (the opposite of a compressor). For example, an expander can
be used to lower the level of background noise that becomes audible when a musician
stops playing.
F
Fast Fourier Transform (FFT) An algorithm based on Fourier Theory that Adobe Audition
uses for filtering, Spectral View, and Frequency Analysis features. Fourier Theory states
that any waveform consists of an infinite sum of sin and cos functions, allowing frequency
and amplitude to be quickly analyzed. Higher FFT sizes create more precise results but
take longer to process.
Flange An audio effect caused by mixing a varying, short delay in roughly equal
proportion to the original signal.
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