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MaWD 3.01

Understand Principles of Audio

TermDefinition
Sounds Vibrations that travel through the air or some other medium.
Sound Wave An audible vibration that travels through air or water.
Decibles The loudness or intensity of a sound.
Crest Point that exhibits maximum amount of upward displacement from the rest position.
Trough Point that exhibits maximum amount of downwards displacement from the rest position.
Wavelength Distance from crest to crest.
Amplitude Distance from the rest to crest or rest to trough.
Frequency Number of waves to pass a point in one second.
Pitch The quality of the sound determined by the rate of vibration. The degree of highness or lowness of a tone.
Analog Continuous phenomena, such as microphones, video cameras (continuous-valued voltages).
Sample Rate The number of samples taken per second, often measured in kilohertz.
Bit Rate The number of computer bits processed per unit of time.
Waveform A visual representation of an audio signal.
Clip One short, continuous piece of digital audio material.
Track An area upon which audio moves. It may be a single waveform or could be made up of clips.
Trim Removes everything from the left and right of selected audio.
Amplify Change the volume of the selected audio.
Capture Process of obtaining a signal from outside the computer. (recording)
WAV Developed by IBM and Microsoft for Windows, lossless, large file size.
AIFF Audio Interchange File Format, developed by Apple, lossless, large file size
MP3 MPEG-1 Audio Layer 3, compressed format, popular for music, good for internet.
.avi (Audio Video Interleave) Can contain both audio and video data in a file container that allows synchronous audio-with-video playback.
.ogg (Ogg Vorbis) Open source, compressed format, good for internet, popular with gaming industry.
Created by: JoeStellman
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Voices

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