Adobe 22011292 User Guide - Page 380

366 VOX The Dialogic ADPCM format is commonly found in telephony applications, and has been optimized for low sample rate voice. It will only save mono 16-bit audio, and like other ADPCM formats, it compresses to 4 bits/sample (for a 4:1 ratio). This format has no header, so any file format with the extension .vox will be assumed to be in this format. WAV Files with the .wav extension typically are Microsoft Windows uncompressed PCM audio files. However, Adobe Audition also supports compressed variations of .wav files such as A-Law, mu-Law, ACM, DVI/IMA ADPCM, and Microsoft ADPCM. Wave File The term Wave File usually refers to any audio file format which contains soundwave data. Windows users sometimes just think of a Wave File as an audio file with the .wav extension, but a Wave File could very well be an .au, .aif, or .mp3 file. Waveform The term Waveform is used to describe the visual representation of a signal (amplitude over time) displayed in Adobe Audition. Waveform can also be used to refer to the signal itself, as in "listen to the waveform". In this case, the term usage is referencing sound waves, and is being used in an acoustical sense. Waveform Block Any waveform entry in the Multitrack environment. A Waveform Block may be an actual representation of a waveform, an Image (a pointer to another waveform block), a copy of another waveform, a spliced section of another Waveform Block, etc. Any edits made to a Waveform Block are nondestructive in nature. You can right-click on a Waveform Block for a menu containing editing commands, or double click on it to "jump into" its source in the Edit View. Wave Display The Wave Display is the part of Adobe Audition's Edit View in which you view and manipulate audio data. By default this audio material is in the shape of a waveform, but it can be displayed as spectral data by choosing the View > Spectral View option. Wet Used to describe an audio signal that has had signal processing (such as reverb) applied; the opposite of Dry. White Noise White noise has a spectral frequency of 1. In other words, equal proportions of all frequencies are present. Because the human ear is more susceptible to high frequencies, white noise sounds very hissy. Adobe Audition generates white noise by choosing random values for each sample. Windows WAV The Microsoft Windows WAV format supports both mono and stereo files at a variety of resolutions and sample rates. It follows the RIFF (Resource Information File Format) specification, and allows for extra user information to be embedded and saved with the wave file. WAV files contain PCM coded audio - which is pure, uncompressed Pulse Code Modulation formatted data. Zero Crossing A place in time where the wave crosses the zero amplitude line. By placing edit points at zero-crossing points, it's much less likely that the edit will create a pop or click after the edit since there won't be a sudden jump in amplitude after the edit.