Convert M4A to AAC
You can convert M4A file to AAC as well as to variety of other formats with free online converter.
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MPEG-4 Audio Layer
File extension | .m4a |
File category | audio |
Description | Apple Inc. has designed an M4A open-source format based on QuickTime Fike. Now the format is being promoted in the iTunes store. It is a multimedia container intended for the placement of sound components and other data, such as images. MPEG-4 files may be stored with extensions M4A and MP4. In the latter case, they contain video as well. Alongside these sound formats, MPEG-4 allows for lossy compaction through FFC Codec. However, it is possible to provide a lossless reduction thanks to the Apple Lossless format. The files may be played on Windows PCs via iTunes, Windows Media Player 12, KSP Sound Player, Winamp, and some other programs. With iTunes, the data can be converted into Windows-supported audio formats. |
Technical details | In comparison with its predecessor MP3, M4A format provides better sound quality and smaller file size. Thanks to lossless compaction, the data may be easily converted in both directions with no quality deterioration. The sound data encoded with ACC compression, which reduces the file size considerably. Due to protection technology DRM, MP4 files cannot be easily distributed, while it is much simpler to replicate files in M4A; that is why “Apple Lovers” prefer the latter format. With M4A, it is possible to buy music on iTunes and download it into smartphones or other devices. |
Programs |
Microsoft Windows Media Player
VLC media player
MPlayer
Amarok
Winamp
Apple QuickTime Player
Apple iTunes
|
Developer | Apple |
MIME type |
audio/mpeg
|
Advanced Audio Coding
File extension | .aac |
File category | audio |
Description | A proprietary format with lossy compression, which have been created as an alternative for MP3 with a higher quality of coding. Overtones out of human perception are being removed. AAC is two times less than MP3, which means 1/10 of CD digital data. The format has been widely used since 1997 as the seventh release of the MPEG-2 family. As hardware players supply it, the format is highly demanded by music fans. It has been widely spread in Apple production and is being used by default in iTunes. |
Technical details | The format conception is similar to MP3, but it is more advanced. Being able to execute larger compression, it is represented as a separate segment of MPEG-4 standard used to create compact audio files. AAC is highly efficient with variable and continuous bitrate, with a sampling frequency of 8-96 kHz. The current version complies with the standard of ISO/IEC 14496-3. Compression is performed based on an auditory masking effect that provides data reduction with no deterioration for sound quality. |
Programs |
Microsoft Windows Media Player
VLC media player
MPlayer
Foobar2000
Winamp
Apple iTunes
Audacity
|
Developer | Bell Labs, Dolby Laboratories, Sony, Nokia, Coding Technologies |
MIME type |
audio/aac
audio/aacp
audio/3gpp
audio/3gpp2
audio/mp4
audio/mp4a-latm
audio/mpeg4-generic
audio/x-aac
audio/x-m4a
audio/x-m4p
audio/x-m4b
audio/mp4a
audio/mpga
|