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.
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.
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.
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.
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.