Glossary
3D sound See surround sound.
5.1 surround sound An audio format involving five channels of full bandwidth audio: center, left, right, left surround and right surround. A special low frequency effects channel (LFE or “.1”) covers a frequency range from 20 Hz to 120 Hz. The basic setup for music production is defined in ITU 775.
A-D Analog-Digital.
AAC Advanced Audio Coding. Special variant of the MPEG standard.
AB (1) Microphone placement for spaced microphones intended for time difference stereo. (2) Manner in which microphones are provided with power. Also called Tonader. (3) A method for comparison of two versions.
absorption A property of materials that reduces the amount of sound energy reflected; unit: sabin. 1 m2 full absorption ...
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