Steinberg WaveLab Elements 7 Manual Page 409

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15.4 Apple Lossless files 395
Typical filename extensions are .aiff, .aif, .aifc, .snd.
Glossary contents
15.4 Apple Lossless files
ALAC (Apple Lossless Audio Codec) is an audio codec developed by Apple Inc. for loss-
less data compression of digital audio. Also known as Apple Lossless and Apple Lossless
Encoder (ALE), ALAC audio data is stored within the MP4 container and uses the mathe-
matical technique of linear prediction to achieve a file size reduction between 60% to 40%,
depending on the audio content.
The Apple Lossless Encoder is part of Quicktime.
Typical filename extensions are .m4a and .alac.
Glossary contents
15.5 ALAW files
ALAW is an audio encoding and compression technique for telephony, using 8-bit resolution.
The EU telephone system uses A-law encoding for digitization.
Typical file extensions are .alaw, .vox
Glossary contents
15.6 Aliasing
Aliasing is a type of distortion caused during the analog-to-digital conversion process. If the
sampling rate is not at least double the frequency of the analog signal, spurious harmonics
and other artifacts may be created.
Careful filtering before the sampling stage can reduce this aliasing to a minimum.
Glossary contents
15.7 Amplitude
Amplitude is the height of a waveform above or below the zero line.
Glossary contents
15.8 ASIO
Audio Stream Input/Output (ASIO) is a computer device driver protocol for digital audio
specified by Steinberg, providing a low-latency and high fidelity interface between a software
application and a computer's soundcard.
WaveLab 7
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