What is an AMR file?
The .amr file extension is linked with the patented Adaptive Multi-Rate (AMR) format, which is widely used in Global System for Mobile Communications. An AMR file is an audio file saved in a compressed audio format. An .amr file is a narrow-band audio recording. AMR files were originally used to store voice memos and voice-mail messages. An AMR file would generally have a small size as a trade-off for audio quality. AMR files incorporate the Algebraic Code Excited Linear Prediction (ACELP) algorithm, which was created to quickly compress human speech. The AMR format originated in an effort to maintain sufficient speech quality under cellular interference. AMR files can be recorded and played back by most mobile phone devices. While a number of media players offer support for .amr files, this format is better handled by software suites, specific to each cellular phone brand.
How to Open AMR Files
How to Make AMR Files
Exact steps for creating AMR files will vary by program and operating system. Download one of the above listed programs and you should be able to follow typical procedure for opening files or creating files from the File menu. Typically you will select File > Open or File > New and continue through the prompts. Some programs may follow a different procedure for either creation or opening of files.