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AMR File

This page contains information on the AMR file extension (Adaptive Multi-Rate Audio Codec), a popular music file format

File extension.amr
CategoryMusic File
DescriptionThe 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 Convert AMR file
View other music file formats
Technical DetailsThe 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
 

Convert AMR file

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

amr to aac (Advanced Audio Coding File)
amr to ac3 (AC3 Audio File)
amr to flac (Free Lossless Audio Codec)
amr to m4a (Compressed video file)
amr to mp3 (Compressed audio file)
amr to mp4 (MPEG-4 Video File)
amr to ogg (Ogg Vorbis Compressed Audio File)
amr to wav (Windows audio file)
amr to wma (Windows Media Audio)

Convert AMR file