.AMR Adaptive Multi Rate File Format

Adaptive Multi Rate File Format (.AMR)

AMR (Adaptive Multi-Rate) is a compressed audio file format used for storing audio data encoded with the patented Adaptive Multi-Rate audio codec. The format was originally introduced and popularized by the Ericsson corporation, but can now be found on every modern mobile device.
The AMR codec is based primarily on the Algebraic Code-Excited Linear Prediction algorithm (ACELP), developed by the VoiceAge Corporation. In October 1998, AMR was adopted by the 3GPP organization as the standard audio codec for the 3G mobile system specification, making Adaptive Multi-Rate encoding dominant in VoIP and mobile communications. With that decision, an increasing number of applications were being developed to natively work with and export AMR files, gradually setting the AMR file format as the standard for storing audio on mobile devices.
However, AMR compression is only useful on human speech recordings, as the ACELP algorithm is designed specifically with that purpose in mind. Therefore, AMR-encoding more complex audio data, such as music for example, usually produces unacceptable results in terms of accuracy and sound quality. Modern smartphones provide alternative applications designed primarily for recording music, which produce better results. These applications don't use AMR at all and let you store your recordings in a more convenient format like WAV instead.
Speaking of AMR files, there is a common misconception about the type of codecs AMR files use. There are indeed two variations of the AMR codec: AMR-NB (Narrow Band) and AMR-WB (Wide Band), but AMR files only use the AMR-NB codec. The AMR-NB codec provides encoding at low bitrates, while its Wide Band alternative is used mostly for transmitting high-quality voice over the mobile network and/or for storing speech recordings in AWB files.
Although widely popular on mobile devices, the AMR file format is still uncommon for desktop environments. Fortunately, AMR files can easily be converted to more convenient desktop audio formats such as WAV or OGG, using free applications like the MIKSOFT Mobile Media Converter.
The mime type for Adaptive Multi Rate File Format (.AMR) is
audio/amr

Open Adaptive Multi Rate File Format (.AMR)

How to open .AMR Adaptive Multi Rate File Format files?
Windows
  • VideoLAN VLC Media Player
  • RealPlayer
  • QuickTime Player
Mac
  • VideoLAN VLC Media Player
  • RealPlayer
  • QuickTime Player
Linux
  • VideoLAN VLC Media Player
  • RealPlayer
  • QuickTime Player
iOS
Android
File formats conversion for .AMR Adaptive Multi Rate File Format
.AA Audible Audio File .AMR to .AA
Convert Adaptive Multi Rate File Format to Audible Audio File
.AA3 Atrac3 Audio File .AMR to .AA3
Convert Adaptive Multi Rate File Format to Atrac3 Audio File
.AAC Advanced Audio Coding File .AMR to .AAC
Convert Adaptive Multi Rate File Format to Advanced Audio Coding File
.AAX Audible Enhanced Audiobook .AMR to .AAX
Convert Adaptive Multi Rate File Format to Audible Enhanced Audiobook
.ABC Musical Notation Language File .AMR to .ABC
Convert Adaptive Multi Rate File Format to Musical Notation Language File
.AC3 Dolby Digital Audio Codec 3 File Format .AMR to .AC3
Convert Adaptive Multi Rate File Format to Dolby Digital Audio Codec 3 File Format
.ACD Acid Project File .AMR to .ACD
Convert Adaptive Multi Rate File Format to Acid Project File
.ACD-ZIP Sony Acid Project File (Inc Embedded Data) .AMR to .ACD-ZIP
Convert Adaptive Multi Rate File Format to Sony Acid Project File (Inc Embedded Data)
.ACM Inter Play Acm Audio File Format .AMR to .ACM
Convert Adaptive Multi Rate File Format to Inter Play Acm Audio File Format
.ACT Adpcm Audio File .AMR to .ACT
Convert Adaptive Multi Rate File Format to Adpcm Audio File
.ADG Ableton Device Group .AMR to .ADG
Convert Adaptive Multi Rate File Format to Ableton Device Group
.ADTS Audio Data Transport Stream File Format .AMR to .ADTS
Convert Adaptive Multi Rate File Format to Audio Data Transport Stream File Format
.AFC Mass Effect 2 Audio File .AMR to .AFC
Convert Adaptive Multi Rate File Format to Mass Effect 2 Audio File
.AHX Win Ahx Tracker Module .AMR to .AHX
Convert Adaptive Multi Rate File Format to Win Ahx Tracker Module
.AIF Audio Interchange File .AMR to .AIF
Convert Adaptive Multi Rate File Format to Audio Interchange File
.AIFC Audio Interchange File (Compressed) .AMR to .AIFC
Convert Adaptive Multi Rate File Format to Audio Interchange File (Compressed)
.AIFF Audio Interchange File .AMR to .AIFF
Convert Adaptive Multi Rate File Format to Audio Interchange File
.AL Alaw Format Sound .AMR to .AL
Convert Adaptive Multi Rate File Format to Alaw Format Sound
.AMZ Amazon Mp3 Downloader Download File .AMR to .AMZ
Convert Adaptive Multi Rate File Format to Amazon Mp3 Downloader Download File
.AOB Dvd Audio Audio Object File .AMR to .AOB
Convert Adaptive Multi Rate File Format to Dvd Audio Audio Object File
.APC Cryo Apc Audio File Format .AMR to .APC
Convert Adaptive Multi Rate File Format to Cryo Apc Audio File Format
.APE Monkeys Audio File .AMR to .APE
Convert Adaptive Multi Rate File Format to Monkeys Audio File
.APF Sony Ericsson Acoustics Settings File .AMR to .APF
Convert Adaptive Multi Rate File Format to Sony Ericsson Acoustics Settings File
.ATRAC Sony Atrac Audio File .AMR to .ATRAC
Convert Adaptive Multi Rate File Format to Sony Atrac Audio File

.AMR Adaptive Multi Rate File Format converter

Disclamer: .AMR Adaptive Multi Rate File Format converter is provided to give you some guidence about how to convert .AMR Adaptive Multi Rate File Format files into other formats. You might need to purchase certain software to do the actual conversion.

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