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DC III Unit 3
Arkansas Digital Communications III Unit 3
| Question | Answer |
|---|---|
| AIF | audio interchange format; an uncompressed audio file format used by Macs |
| Audio/sound | audible content in media production and publishing |
| Bidirectional microphone | microphone that picks up sound from two opposite directions |
| Bit rate | the number of bits per second processed when sampling sound (bps). |
| Boom microphone | a directional mic that is mounted on a boom arm and positioned just out of camera |
| Key frame | a frame in a timeline where a change will occur; used in audio, video and animation production |
| Kilohertz | one thousand hertz; measures the sampling rate of an audio file |
| Lavalier microphone (lapel) | a small microphone designed to pick up speech from a single person, typically attached to the subject's clothing with a specialized clip |
| MIDI | musical instrument digital interface; format for recording music from synthesizers and other electronic instruments |
| Mixing | audio mixing is the process by which sounds are combined into one or more channels |
| mono | an audio signal that is mixed together and routed through a single audio channel |
| Mounted microphone | a microphone that is attached to a stand or boom |
| MP3 | mpeg 3; a compressed audio file format that is the current standard for exchanging audio files over the Internet; 1/10 the size of a wave file |
| MP4 | mpeg 4; a compressed file format that can be used for audio or video; appropriate for streaming |
| Omnidirectional microphone | microphone that captures equally from all directions |
| Original work | a distinctive piece created by an author or artist |
| Ripping | the process of digitally extracting audio from CDs to your hard drive |
| Sampling rate | the number of samples taken per second when sound is recorded; 1Hz-1 sample per second; currently measured in kilohertz; 44.1 is CD quality, 22.1 is radio quality |
| Silence | the absence of sound in a production; used to set a mood or provide a moment for reflection |
| Sound effects | audio effects other than music or speech that are enhanced or artificially created and added in postproduction |
| Speech | an example of audio that can include voice overlay, dialogue or direct address |
| Stereo | an audio signaled divided into two separate channels, played back simultaneously via separate speakers |
| Streaming | playing audio or video immediately as it is downloaded from the Internet, rather than storing it in a file on the receiving computer first |
| WAV | waveform; uncompressed audio format for Windows |
| Wireless microphone | a microphone that is not physically connected to a camera or recording equipment |
| WMA | windows media audio; compresssed audio format originally designed for Windows Media Player |