Adobe 22011292 User Guide - Page 372

358 Dry Used to describe an audio signal without any signal processing (such as reverb); the opposite of Wet. DSP See Digital Signal Processing. DVD Digital Video (or Versatile) Disc. A storage medium similar to Compact Disc (CD), but with much higher bandwidth and storage capabilities. Audio stored on DVD movies is generally 96 kHz/24-bit. DVI See IMA ADPCM. DWD This is the audio format used by DiamondWare's Sound Toolkit, a programmer's library that lets you quickly and easily add high-quality interactive audio to games and multimedia applications. It supports both mono and stereo files at a variety of resolutions and sample rates. Echo A distinct repetition of a sound, due to the sound reflecting off a surface. Adobe Audition offers two Echo Effects (Echo and Echo Chamber), each with several settings. Envelopes Adobe Audition uses several types of envelopes (Pan, Volume, Wet/Dry, and FX Parameter) for mix automation. The envelopes can be drawn directly on the blocks in the Multitrack view, and represent the pan, volume, wet/dry, and/or FX parameter settings at any point along the track. For instance, when the volume envelope is at the top of the wave block, the audio is at full volume, and when it is at the bottom, it's at zero volume. Equalization (EQ) Equalization is the process of increasing or decreasing the amplitude of audio signals at a specific frequency band relative to the signals at other audio frequencies. Expander Expanders are used to expand the dynamic range of an audio signal. (They are basically the opposite of a compressor). An expander can also be considered an amplifier with two gain levels: the gain is unity for input signal levels above a certain threshold, and less than unity for signals with levels below the threshold. An expander boosts the highlevel signals and attenuates low-level signals. Fast Fourier Transform An algorithm based on Fourier Theory that Adobe Audition uses to perform its filtering functions, as well as Spectral View and Frequency Analysis functions. Flange An interesting audio effect caused by mixing an approximately even amount of a varying short delay with the original signal. Adobe Audition's Flanger effect can be found in Effects > Delay Effects. Flushing The process Adobe Audition performs when it copies the audio data from a waveform file to Adobe Audition's temp folder so that the original file can be closed. This allows the file to be renamed, deleted, or opened exclusively by another application. Flushing sometimes occurs when a modified waveform is saved on top of its original file. Fourier Theory Fourier Theory states that any waveform can be made up of an infinite sum of sin and cos functions. By using Fourier Theory, waveforms can be quickly analyzed for their frequency and amplitude content. Frequency Measured in Hertz (Hz), a sound's Frequency is the rate at which it vibrates, or its cycles per second. A cycle consists of movement from a starting point (0) through both positive and negative amplitudes, eventually returning to the starting point. A sound's frequency determines its pitch. FX An abbreviation for the word effects. Hertz (Hz) This is a unit of measurement used to measure the frequency of a sound. Hertz are equal to cycles per second.