AMR to M4A

Convert AMR to M4A - online and free - this page also contains information on the AMR and M4A file extensions.

convert AMR to M4A ❯

How to convert a AMR to a M4A file?

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File extension	.amr
Category	Audio File
Description	The Adaptive Multi-Rate format was specifically designed for speech coding. Many phone providers use the AMR format to store short audio recordings but shouldn't really be used to store other audio such as music due to it's design. In 1999 AMR was adopted as the chosen speech standard for 3GPP. The AMR file is often converted into other formats to allow for use and ease of distribution.
Actions	*AMR to M4A* - Convert file now View other audio file formats
Technical Details	The AMR codec uses eight source codecs with bit-rates of 12.2, 10.2, 7.95, 7.40, 6.70, 5.90, 5.15 and 4.75 kbit/s and has a sampling frequency of 8kHz which is filtered to 200-3400 Hz. The AMR algorithm utilises link adaptation in order to be utilised with radio channel and capacity requirements.
Associated programs	Apple QuickTime Realplayer VLC media Player Winamp
Developed by	3rd Generation Partnership Project (3GPP)
MIME type	audio/amr
Useful links	Further information on Multi-rate audio files What is an AMR file ? Convert AMR file

File extension	.m4a
Category	Audio File
Description	M4A files are a type of audio file developed and popularised by Apple. Since 2007, music purchased through the iTunes store has been in m4a format, therefore accounting for over 15 billions files worldwide. MP4 and M4A files are often confused, and the two are quite similar, being both based on the MPEG-4 codec. However, M4A is a file comprising solely of audio, whereas MP4 may also contain video.
Actions	Convert M4A file View other audio file formats
Technical Details	M4A files are superior to MP3 in terms of the scale of compression and audio quality. The M4A file uses Apple's codec and resides within the MPEG-4 container. The main benefit of M4A is that files are compressed but are lossless. This means they can be decoded back to the original quality they were at the point of compression. Another benefit of M4A files are that do not carry any Digital Rights Management (DRM) protection associated with other files meaning they are less restricted.
Associated programs	Apple QuickTime Player Apple iTunes Microsoft Windows Media Player
Developed by	Apple
MIME type	audio/mp4a-latm
Useful links	Detailed guide to M4A More detail on the MPEG4 format Convert M4A file

Using Zamzar it is possible to convert AMR files to a variety of other formats

AMR to M4A - Convert file now