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AMR file

This page contains information on the AMR file extension (Adaptive Multi-Rate audio codec file)

File extension .AMR
CategoryAudio File
DescriptionThe AMR format uses a speech coding pattern, which is now applied in the GSM system. It encodes compressed spoken audio data and uses multi-rate codecs, such as DTX, ACELP, CNG and VAD. There are eight bitrate values for AMR, ranging from 4.75 kb/s to 12.2 kb/s. This structure allows the codecs to create a group of 160 twenty-millisecond-long samples within a frame. AMR files can be played in a number of Windows-based media players, as well as mobile devices, such as Android, Apple, etc. Most users prefer to convert AMR tracks to MP3, WMA, etc. tracks.
Associated programsMedia Player Classic
Developed by
MIME typeaudio/amr
audio/3gpp
audio/3gpp2
Useful linksMore detailed information on AMR files

Convert AMR files

Using CoolUtils Online AMR Converter it is possible to convert AMR files to a variety of other formats:

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