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File converter / Audio / Convert to MP3 / AMR converter / MP3 to AMR

Convert MP3 to AMR

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Choose file to convert to .amr
or drag and drop file

You can convert MP3 file to AMR as well as to variety of other formats with free online converter.

How to convert mp3 to amr?

How to convert amr to mp3?
Step 1

Upload mp3-file

Select mp3 file, which you want to convert, from your computer, Google Drive, Dropbox or drag and drop it on the page.
Step 2

Convert mp3 to amr

Select amr or any other format, which you want to convert.
Step 3

Download your amr-file

Wait till your conversion process will be completed and click download converted amr file.

Online and free mp3 to amr converter

Fast and easy
Just drop your mp3 files on the page to convert amr or you can convert it to more than 250 different file formats without registration, giving an email or watermark.
Don't worry about security
We delete uploaded mp3 files instantly and converted amr files after 24 hours. All files transfer with secured an advanced level of SSL encryption.
All in the cloud
You don't need to install any software. All mp3 to amr conversions make in the cloud and don't use any resources of your computer.

MP3 Audio File

File extension .mp3
File category audio
Description

MP3 (formally MPEG-1 Audio Layer-3 or MPEG-2 Audio Layer-3) is a digital format for storage of audio files as well as for audio streaming. The format was designed by MPEG programmers. It is one of the most required codecs for digital coding. The format is widely used in various file-sharing sites for evaluation downloading.

Due to lossy compression in this audio format, it is possible to compress CD tracks up to 1/10 of their original size while maintaining high playback quality. Moreover, it can be encoded at higher or lower bit rates to adjust the resulting quality. Overtones, which cannot be perceived by a human ear, are removed. Complex algorithms allow for smaller size of tracks. As a result, one compact disk can contain several hundred songs. MP3 is compatible with all most popular operating systems and supported by the most of modern DVD-players and music systems.

Technical details

Prior to MP3 introduction, MPEG-1 had been widely used. That format contained not only audio data, but images as well. MP3 breaks an audio file into parts of the same length. When the processing is over, each part is packed into its own frame. It involves the technology of spectral limit that requires a continuous input signal to provide the use of two adjacent frames.

When spectral deleting is over, the file is to be compressed with mathematic methods. If necessary, compression rate can be changed, even inside the same frame. Files of 128 kbit/s have 11-fold compression. Further reduction of the file size will lead to significant deterioration in sound quality.

Programs
Microsoft Windows Media Player
VLC media player
MPlayer
jetAudio
Zune
Audacity
Apple iTunes
Plex Media Center
Amarok
Xine
Totem
Developer Moving Picture Experts Group
MIME type
audio/mp3
audio/mpeg3
audio/mpg
audio/mpeg
audio/x-mpeg
audio/x-mpeg-3
audio/mp3
audio/x-mpegaudio
audio/x-mpg
audio/x-mp3

Adaptive Multi-Rate Codec File

File extension .amr
File category audio
Description AMR is a compressed file format that functions to enhance speech coding and it consists multiple sampling rates narrow band devices used in encoding or decoding. Recording of AMR files can be done using mobile phones. For video and audio files to play at the same time or accomplish random access memory, one can utilize the 3GPP format. 160 20- millisecond samples embedded in each frame are coded using AMR using ACELP, DTX, VAD and CNG. Recorded AMR files can be converted into other files allowing their use and for them to be distributed.
Technical details AMR has the ability of encoding signals of ranging from 4.75 to 12.2 kbit/s with quality that begins at 7.4 kbit/s.3GPP took up file format in 1999. It is a method that is utilized by GSM and UMTS, it is uses link adaptation to select one of the eight different bit rates. Link adaptation is optimized by AMR with the best codec devices that exist for it to be used by radio channels and capacity requirements. This only works if the connection is good enough to prevent the loss of audio quality.
Programs
Apple QuickTime
Realplayer
VLC media Player
Main program Audacity
Developer 3rd Generation Partnership Project (3GPP)
MIME type
audio/amr

FAQ

❓ How can I convert mp3 to amr?
Firstly, select a mp3 file you want to convert or drag and drop it. Secondly, select amr or any other format you want to convert your file to. Then click convert and wait until your file is converted
⏳ How long should I wait to convert mp3 to amr?
Audio conversion usually takes a few seconds. You will convert mp3 to amr very quickly.
🛡️ Is it secure to convert mp3 to amr on OnlineConvertFree?
Sure! We delete your uploaded and converted files, so nobody has access to your information. All types of conversion on OnlineConvertFree (including mp3 to amr) is 100% safe.
📱 Can I convert mp3 to amr without software installation?
Absolutely! OnlineConvertFree doesn’t require installation. You can convert any files (including mp3 to amr) online on your computer or mobile.