.amr AMR audio
Audio
| MIME type | audio/AMR |
|---|---|
| Description | AMR audio |
| Acronym | AMR – Adaptive Multi-Rate |
| Category | Audio |
| Signature (magic bytes) | 23 21 41 4D 52 0A (#!AMR.)23 21 41 4D 52 5F 4D 43 31 2E 30 0A (#!AMR_MC1.0.) |
Frequently asked questions
What is a .amr file?
A .amr file is a “AMR audio” (MIME type audio/AMR). AMR stands for Adaptive Multi-Rate.
How do I open a .amr file?
With a media player such as VLC, which plays almost every audio format; on Windows also Media Player, on macOS Music or QuickTime. To edit it, use Audacity for example.
How can you tell a genuine .amr file?
By the bytes at the start of the file, the signature (magic bytes): 23 21 41 4D 52 0A (#!AMR.) and 23 21 41 4D 52 5F 4D 43 31 2E 30 0A (#!AMR_MC1.0.). On Linux and macOS, file --mime-type example.amr checks the real type regardless of the extension.
Which MIME type belongs to .amr?
The MIME type is audio/AMR. In the Apache web server: AddType audio/AMR .amr; in nginx: types { audio/AMR amr; }.