AMR file Converter
Online AMR file Converter - Instant Download!
How to use AMR Converter
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Step 1 - Upload a file
Select a file from your computer using the browse function.
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Step 2 - Choose a destination format
Choose a destination format like AMR, AAC, AU, FLAC, M4A, MKA, MP3, OGG, WAV, WMA. We support most audio formats.
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Step 3 - Download your audio file
Download your converted file immediately.
More information on AMR, Adaptive Multi-Rate Audio File (.amr)
The .amr file format
The Adaptive Multi-Rate (AMR) codec is an audio compression format enhanced for speech coding. It is also a file format for holding audio speech via the AMR codec. Storage of short audio recordings in the AMR format is a feature common to numerous modern mobile handsets and either free or patented programs exist for conversion between these formats.
.amr technical details
AMR speech codec is made up of a multi-rate speech codec in narrowband (200–3400 Hz) that encodes these types of signals at variable bit rates ranging between 4.75 to 12.2 kbit/s with toll quality audio (comparable to that of an ordinary long distance call) starting at 7.4 kbit per second. AMR is now widely used in GSM[4] and UMTS, having been adopted as the standard speech codec in October 1999 by 3GPP . Using link adaptation it is able to choose from one of eight different bit rates based on the particular link conditions.
Additional information about AMR file format
| File extension | .AMR |
| File category | AUDIO |
| Useful links | http://pcsupport.about.com/od/fileextensions/f/amrfile.htm http://www.amrplayer.com/ |
| File conversion | Convert a file to AMR |
| Developer | 3rd Generation Partnership Project (3GPP) |
| Associated programs | Apple iPhone Audacity Android AMR Player Open Source software QuickTime Real Player VLS Media Player |