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Absorption - The ability to take in sound rather than reflect it.

Acoustic / Acoustical - Anything to do with sound that can be heard by the ears.

Acoustic Amplifier - The part of an instrument which makes the vibrating source move more air or move air better; this makes the sound of the instrument louder. Examples of acoustic amplifiers include The body of an acoustic guitar or the shell of a drum.

A/D - Analog to Digital Converter. An electronic device that takes the voltage produced by an analog signal and converts it into a digital format for storage on your computer

ADAT - A trademark of Alesis Corporation. Adat was an early modular digital multitrack machine that was capable of recording 8 tracks but could also be linked together to increase the track count. The optical digital interface is still used today to add devices and expand digital audio workstations.

AES/EBU Professional Interface - A standard for sending and receiving digital audio adopted by the Audio Engineering Society and the European Broadcast Union.

Ambience - The part of the sound that comes from the surrounding environment rather than directly from the sound source.

Ambient Micing - Placement of a microphone in a location where the reflections off surrounding surfaces are louder than the direct sound from the source.


Amplification - An increasing of signal strength.

Amplifier - A device which increases the amplitude (level) of an electrical signal (making it louder).

Amplitude - The height of a waveform above or below the zero line.

Analog (Analogue) - A signal that is captured in direct proportion to it's source. A microphone creates an electrical signal that is in direct proportion to the sound-waves in the air created by a singers voice.

Analog Recording - A recording of the continuous changes in voltage of an signal.

Analog To Digital Converter - A device that takes the voltage produced by an analog signal and converts it into a digital format for storage on your computer

Attack - The rate the sound begins and peaks in volume.

Attenuation - A making smaller: reduction of electrical or acoustic signal strength resulting in a lower volume.

Audio - Electrical signals resulting from a sound pressure wave being converted into electrical energy.

Automatic Gain Control (Automatic Volume Control) - A compressor with a very long release time used to keep the volume of the audio very constant.

Axis - The direction the sound must take to address the microphone where it is most sensitive to the sound.
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