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About MP3/WMA/AAC/M4A/WAV/FLAC/APE/DSD
Caution
Except for personal use, it is strictly forbidden by copyright laws and international conventions to copy,
distribute, or transmit any audio data (including MP3/WMA/AAC/M4A/ WAV/FLAC/APE/DSD data), whether
for free or for a charge, without the consent of the copyright owner.
What is MP3?
MP3, with the formal name of “MPEG Audio Layer 3”, is a compression standard defined by MPEG, a joint
executing agency under ISO (International Organization for Standardization) and IEC. An MP3 file contains
compressed audio data. MP3 encoding can compress audio data at an extremely high ratio, thus reducing the
music file's size to one tenth of the original size. At the same time, the sound quality remains close to that of
CD. MP3 achieves such a high compression rate by removing sounds that cannot be heard by humans or that
are drowned by other sounds.
What is WMA?
WMA, or “Windows Media™
Audio”, is compressed audio data. WMA is similar to MP3 audio data.
What is AAC?
AAC is the abbreviation of “Advanced Audio Coding”, which is a basic audio compression format used for
MPEG2 or MPEG4.
What is M4A?
M4A is the extension of standard MPEG-4 audio data. An M4A file contains compressed audio data.
What is WAV?
WAV is an audio file format developed by Microsoft. It conforms to the file specifications of RIFF(Resource
Interchange File Format) and is used to save audio information and resources on the Windows platform. It is
widely supported by the Windows platform and its applications. This format also supports several
compression algorithms such as MSADPCM and CCITT A LAW, and supports multiple audio digital
sampling frequencies and sound channels. A WAV file of standard format has the same 44.1kHz sampling
frequency and 16 digitalizing bits as CD format, and thus have nearly the same sound quality as CD! It is the
audio format that is the closest to lossless music, and therefore the file size is large.
What is FLAC?
FLAC can be explained as lossless audio compression and coding. FLAC is a well-known free audio
compression and coding technology characterized by lossless compression.
Different from lossy compression and coding such as MP3 and AAC, it will not destroy any original audio
information.
What is APE?
APE is one of the popular lossless compression formats for digital audio. Different from lossy compression
formats such as MP3 that removes data (to which the human ear is not sensitive) irreversibly to reduce the size
of the original file, lossless compression formats such as APE reduce the file size by a more refined recording
method, so that the restored data is the same as the original file. The integrity of the file is ensured.
What is DSD?
DSD audio format is a lossless audio format. Due to its distinct encoding mode from common encoding
modes, which is a digital encoding, it is a less popular but special audio format.
Method of creating MP3/WMA/AAC/M4A/WAV/FLAC/APE/DSD files
Use software with MP3/WMA/AAC/M4A/WAV/FLAC/APE/DSD coding and encoding for compression of
audio data. For details about the creating of MP3/WMA/AAC/M4A/WAV/FLAC/APE/DSD files, please refer
to the user manual of the software. The MP3/WMA/AAC/M4A/WAV/FLAC/APE/DSD files that can be
played by this device have the following extensions.
MP3: ”mp3”
WMA: ”wma”
AAC: ”m4a”