Exciter
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An enhancer that works by synthesizing new high frequency harmonics.
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Boom
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Boom: Extendable lightweight support pole for attaching a suspension device to hold the microphone. Principally used by the boom operator or sound recordist.
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VO
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Voice-over (also known as off-camera or off-stage commentary) is a production technique where a non-diegetic voice is used in a radio, television, film, theatre, or other presentation.The voice-over may be spoken by someone who appears elsewhere in the production or by a specialist voice actor.
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Comb-filter effect
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The frequency response caused by combining a sound with its delayed replica. The frequency response has a series of peaks and dips caused by phase interference. The peaks and dips resemble the teeth of a comb.
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Attenuator
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In a mixer (or mixing console) input module, an adjustable resistive network that reduces the microphone signal level to prevent overloading of the input transformer and mic preamplifier.
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Crossover
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An electrical device that divides the audio spectrum of a particular source into smaller groups of frequencies, making it easier for down stream components to handle the load. The most common use of crossovers is in amplifier/speaker systems, which allows the separate components to function more efficiently.
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CoreAudio
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Refers to the built-in audio capabilities of the Mac OS X. Similar to Sound Manager found in earlier Apple OS, CoreAudio deals with the way audio is handled within the computer and any application that is written specifically written to support it.
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Closed Back
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In reference to headphones, describes the design of the cup where there is no venting of the audio to the outside. Closed back, circumaural headphone are often used in studios, where "bleed" from the headphone can be picked up by the recording microphone. Closed back headphones minimize this problem.
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Class H
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If an amplifier has more than one voltage rail then it is designated Class H. Its operation involves changing the power supply voltage from a lower level to a higher level when larger output swings are required. For most musical program material the output stage is connected to the lower supply voltage, and automatically switches to the higher rails for large signal peaks.
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Class AB
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A class AB amplifier is a combination of both class A and B in that the output bias is set so that current flows in a specific output device appreciably more than a half cycle but less than the entire cycle.
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