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MAWD Lesson 3.01

Introduction to Digital Audio

TermDefinition
Sounds vibrations that travel through the air or some other medium.
Sound Wave an audible vibration that travels through air or water.
Decibels the measurement of the loudness or intensity of a sound.
Crest the point that exhibits the maximum amount of upward displacement from the rest position.
Trough the point that exhibits the maximum amount of downward displacement from the rest position.
Wavelength the distance from crest to crest.
Amplitude the distance from rest to crest or rest to trough.
Frequency number of waves to pass a point in one second. (how long)
Pitch the quality of a sound determined by the rate of vibration.
Analog continuous phenomena, such as microphones, video cameras, video cameras (continuous-valued voltages)
Sample Rate the rate or frequency at which sound is sampled to digitize it; the measurement of a sound wave over the time in Hz. (cycles/sec)
Bit Rate the number of computer bits that are conveyed or processed per unit of time.
Waveform a visual representation of an audio signal.
Clip a short segment of audio; can be combined with others to make an audio track.
Track area upon which audio moves.
Trim removes everything from the left and right of selected audio.
Amplify change the volume of selected audio.
Capture
WAV high quality, developed by IBM and Microsoft for Windows, and large file sizes.
AIFF developed by Apple, high quality (lossless), and large file sizes
MP3 compressed format, popular for music (MP3 Players), and well suited for the internet.
.avi (Audio Video Inerleave
.ogg (Ogg Vorbis) open source, compressed format, well suited for the internet, and popular in the gaming industry.
Created by: ctsasa
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