17 terms

Digital audio file types

STUDY
PLAY
Bitrate
The number of bits per second that can be transmitted along a digital network.
Sample
The number of samples of audio carried per second, measured in Hz or kHz
Lossy
The class of data encoding methods that uses inexact approximations and partial data discarding to represent the content.
Lossless
a class of data compression algorithms that allows the original data to be perfectly reconstructed from the compressed data.
Compression
Archives, like .zip or .rar. Compressing multiple files into one.
Uncompressed
Data not compressed.
Megabyte
a unit of information equal to 2^20 bytes or, loosely, one million bytes.
Gigabyte
a unit of information equal to one billion (109) or, strictly, 2^30 bytes.
kb/s
a unit of data transfer rate equal to 1,000 bits per second
mp3
a standard technology and format for compressing a sound sequence into a very small file (about one-twelfth the size of the original file) while preserving the original level of sound quality when it is played.
.aac
AAC is the default format used by iTunes. It produces better audio quality than MP3 for a given data rate
FLAC
Free Lossless Audio Codec, and it is an audio compression format like MP3, but while MP3 uses a "lossy" compression, which basically discard audio information that humans can't hear, FLAC uses a lossless compression, which will not change the quality of the compressed audio.
ALAC
Apple Lossless Audio Codec, or Apple Lossless Encoder (ALE), is an audio coding format, and its reference audio codec implementation, developed by Apple Inc. for lossless data compression of digital music.
codec
a device or program that compresses data to enable faster transmission and decompresses received data.
.wav
a file extension for an audio file format created by Microsoft. The WAV file has become a standard PC audio file format for everything from system and game sounds to CD-quality audio.
Dolby
an electronic noise-reduction system used in tape recording to reduce hiss.
.aiff
Audio Interchange File Format is an audio file format standard used for storing sound data for personal computers and other electronic audio devices