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30. Glossary
A-D Convertor
The conversion of analog data or information into digital or binary form (See binary).
ASIO
Audio Stream Input Output. ASIO, developed by Steinberg, is a cross-platform, multi-channel audio transfer protocol.
It allows software to have access to the multi-channel capabilities of a wide range of powerful sound cards.
Binary
A digital numbering system based on two where data is expressed as combinations of "0"s and "1"s). Bit - A single
unit of digital information expressed as a "0" or "1.”
CoreAudio
This is an ultra-low latency, high quality MAC-compatible audio driver that is built directly in to the OS X operating
system.
Decibel (dB)
A unit of measurement for expressing sound pressure level (SPL), signal level and variation or differences in signal
level.
D-A Convertor
A circuit used to change digital data into analog voltage levels that approximate the original analog audio waveform.
DSP
An abbreviation for Digital Signal Processing (Any signal processing done after an analog audio signal has been
converted into digital audio.
Dynamic Range
The level difference expressed in dB, between the loudest level and quietest level of a recording or live audio source.
Filter
A circuit that removes or acts on certain frequency signals above or below a predetermined point called a cut-off
frequency.
Frequency
The rate or speed at which an audio source generates, measured in complete cycles per second. The number of cycles
that occur in one second is call hertz (Hz).
Frequency Range
The range of frequencies a device is capable of accurately reproducing.
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