M4A to AMR Converter

Convert M4A to AMR online, for free.



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Auto
Choose a codec to encode or compress the audio stream. To use the most common codec, select "Auto" (recommended). To convert without re-encoding audio, choose "Copy" (not recommended).
100% represents the original volume. To double the volume, increase it to 200%. To reduce volume by half, select 50%
Enable if you want to reverse audio stream
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Specify the end position of trim (HH:MM:SS.MS). Leave at 00:00:00.00 to disable.


How to Convert M4A to AMR?

  1. Click the “Choose Files” button to select your M4A files.
  2. Click the “Convert to AMR” button to start the conversion.
  3. When the status change to “Done” click the “Download AMR” button

Easy to Use

Simply upload your M4A files and click the convert button. You can also batch convert M4A to AMR format.

Best Quality

We use both open source and custom software to make sure our conversions are of the highest quality. In most cases, you can fine-tune conversion parameters using “Advanced Settings” (optional, look for the icon).

Free & Secure

Our M4A to AMR Converter is free and works on any web browser. We guarantee file security and privacy. Files are protected with 256-bit SSL encryption and automatically delete after a few hours.


MPEG 4 Audio (M4A) compresses and encodes audio files by using one of two coder-decoder algorithms: Advanced Audio Coding (AAC) or Apple Lossless Audio Codec (ALAC). M4A files are smaller in size while simultaneously better in quality than MP3 files, with which it shares the most similarities, in comparison to all other audio file formats.

 

How to open an M4A file?

M4A files open in most well-known, audio-playback programs, including iTunes, QuickTime, and Windows Media Player. For Apple users, iTunes is the default program to open M4A files. For Windows users, the default program is Windows Media Player. Users can also preview M4A files by highlighting the file and pressing the spacebar.

 

Additionally, M4A opens in VLC media player, Adobe Premiere Pro, Elmedia Player, Winamp, and a host of other programs.

 

Developed by: ISO/IEC, Moving Pictures Experts Group

Initial Release: 2001

Useful links:

https://en.wikipedia.org/wiki/MPEG-4_Part_14

https://www.loc.gov/preservation/digital/formats/fdd/fdd000037.shtml


Adaptive Multi-Rate (AMR) is a compressed audio file that is often used for speech coding. The AMR speech codec focuses on narrowband signals, which makes it ideal for voice recordings and radio. It is used regularly in Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS).

 

How to open an AMR file?

Since AMR files are often used on mobile phones, including for MMS messaging, most 3G mobile devices are able to open them. AMR also opens with VLC media player, QuickTime, RealPlayer, and Xine.

 

Other software, such as the free audio-editing software Audacity, can open AMR files. Download audacity easily at SourceForge.net. Because AMR files are heavily compressed and focused on narrowband signals, they are not suitable for music files.

 

Developed by: 3rd Generation Partnership Project (3GPP)

Initial Release: 1999

Useful links:

https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_codec

https://www.etsi.org/


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