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Audio
Apple Lossless Audio Codec
This is a codec for lossless audio compression method developed by
Apple Inc. This codec can be played back on iTunes, iPod or iPhone. Data
compressed to approximately 60 – 70 % can be decompressed to exactly
the same original data.
FLAC (Free Lossless Audio Codec)
FLAC stands for Free lossless Audio Codec, and is a lossless free audio
file format. Lossless means that the audio is compressed without any loss
in quality.
The FLAC license is as shown below.
Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
2009 Josh Coalson
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
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Neither the name of the Xiph.org Foundation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
LFE
This is an abbreviation of Low Frequency Effect, which is an output
channel that emphasizes low frequency effect sound. Surround audio is
intensified by outputting 20 Hz to 120 Hz deep bass to the system
subwoofer(s).
MP3 (MPEG Audio Layer-3)
This is an internationally standardized audio data compression scheme,
using the “MPEG-1” video compression standard. It compresses the data
volume to about one eleventh its original size while maintaining sound
quality equivalent to a music CD.
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