A-Weighting

Simply put A-Weighting refers to introduction of a filter to reduce certain frequencies when measuring sound in order to obtain results that match better with the frequency response of our ears / audition.

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A-B-X Test

A-B-X Test refers to that method of comparing a change in a component or sound quality when three audio sources are available. A and B are the original source and the original source with some modification to the signal path or sound quality.

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Absolute Phase

More correctly termed absolute polarity, absolute phase describes a situation in which the phase remains constant throughout a signal path compared to a reference. In real situations, absolute phase means that the + and – polarity of a system are maintained from beginning to end.

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A-B Stereo

A-B Stereo is a recording technique. For this you have to use two identical omnidirectional microphones placed some distance apart. A-B stereo microphone technique is often used when the sound source is wide and/or when the distance from the microphones to the source is significant or become somehow relevant in that process of recording.

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A-B Repeat

A-B Repeat refers to that function or option of a hardware or software audio recorders/players that cycles or loops a section of a track.

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A-B Comparison

A-B Comparison refers to the process of switching between two audio sources or parts of a grear / equipment to compare a parameter setting, component, or sound quality. The best A-B comparisons are “blind,” where the listener does not know the identity of the sources until after the test is concluded. The test results are better if the two sources can be switched instantly.

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AAC

AAC is the abbreviation for Advanced Audio Coding, a lossy digital audio data compression and encoding system developed by the MPEG group, as the basis of MPEG-4 and other Internet, wireless, and digital broadcast systems, and intended as the successor to MP3. Claimed improvements over MP3 include more (and higher) sample frequencies, up to 48 channels, increased coding efficiency, improved high-frequency response over 16 kHz, and more. A wide variety of hardware and software devices support AAC, most notably Apple’s iTunes and iPods.

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A-440

A-440 or A440 reffers to the note A, tuned to 440 Hz. A-440 is the standard tuning pitch for most Western music and it is also known as the Stuttgart pitch.

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A Cappella

As a first definition for “a cappella”, this term refers to a vocal arrangement or a vocal part without instrumental or any kind of accompaniment. In the dj-ing area or remixing jobs the term can also indicate the main vocal part or lead vocal track from the original multitrack recording which can be used as the basis for a whole new edit.

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Attenuation

Attenuation refers to that gradual loss of intensity, the reduction of amplitude or superficially put, volume. In fact, it means to reduce or just make quieter.

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AFL (After Fade Listen)

Also called “Post Fade Listen”, AFL (After Fade Listen) is the feature that comes within the pro mixing desks / consoles which gives to sound engineers or artists the possibility of monitoring one or more specific signals / tracks alt the same level set by the fader of level control knob. Aux Sends are mostly monitored AFL.

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A/D Converter (ADC – Analog to Digital Converter)

Analog to Digital Converter (or simply put ADC, A/D or A to D) is that device which transforms analog audio signals into digital form / data. The reverse operation of this process is made by a Digital to Analog Converter (DAC). An Analog to Digital Converter is one of the most used devices in today music production industry since the computers are the core of today recording and production studios. Once converted into a digital form, digital audio signals can be processed in a lot of ways, the only limit being the software and the actual music production software solutions can reach the sky.

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Aiff

AIFF is the abbreviation for Audio Interchange File Format. The term “AIFF” refers to that audio file format standard developed by Apple in 1988 after Electronic Arts Interchange File Format known as IFF. The extension of this standard is .aiff or .aif and it can be found as being used mostly on Apple powered computer systems. Along with SDII and also WAV, AIFF standard is leading format used by pro audio and pro video applications because it is uncompressed and also lossless.

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