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3.01 Audio Key Terms
Audio Key Terms
Term | Definition |
---|---|
Sounds | vibrations that travel though the air or some other medium |
Sound Wave | an audible vibration that travels through air or water |
Decibels | 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 downward displacement from the rest position |
Wavelength | distance from crest to crest |
Amplitude | distance from rest to crest or rest to trough |
Frequency | number of waves to pass a point in one second |
Pitch | quality of a sound determined by the rate of vibration. The degree of highness or lowness of a tone |
Analog | a continuous phenomena, such as microphones, video cameras (continuous-valued voltages) |
Sample Rate | the rate or frequency at which a sound is sampled to digitize it. Measurements of a sound wave over time measured in Hz |
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. It can be combined with others to make an audio track |
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 selected audio |
Capture | to record audio, video, or still images as digital data in a file |
WAV | developed by IBM and Microsoft for Windows, high quality (lossless), large file size |
AIFF | developed by Apple, high quality (lossless), large file size |
MP3 | compressed format, popular for music (MP3 players), well suited for internet |
.avi (Audio Video Interleave) | created by Microsoft, uses less compression than MOV or MPEG, supported by almost all computers using Windows |
.ogg (Ogg Vorbis) | open source, compressed format, well suited for internet, popular with gaming industry |