What Is an AMR File?
A file with the AMRfile extensionis an Adaptive Multi-Rate ACELP Codec file.
ACELP is a human speech audio compression algorithm that stands for Algebraic Code Excited Linear Prediction.

Lifewire / Derek Abella
AMR files are saved in one of two formats, depending on the frequency range.
The methodology and specific file extension might differ because of this.
There’s more on that below.

Plus, it’s cross-platform, so it will run on Windows, Mac, and Linux.
Some other options includeAMR Player,MPC-HC, andQuickTime.
Be sure toreview Audacity’s privacy policyto ensure youre comfortable with its terms before you download and use it.
Like FileZigZag, it runs entirely in your web net web surfer.
Still Can’t Open It?
3GA is used for audio, so don’t confuse it with the3GPvideo container format.
They might use the AWB file extension instead.
FAQ
Certain Android phones do, but iOS hasn’t supported the AMR format for many years.