Audio
What is a .amr file?
A .amr file is an Adaptive Multi-Rate Audio. This is an audio format. Confusingly, this extension has been used by 2 different formats over the years — they're all listed below.
This extension has been used by more than one format
2 different formats have claimed .amr over the years, so two files with the same extension aren't necessarily the same kind of thing.
How to open a .amr file
- VLC plays almost every audio format ever made.
- Audacity opens it for editing.
The registry records this extension against Adaptive Multi-Rate Audio, Amazon Kindle eBook File, so software from that family is the most likely match.
How to convert a .amr file
- Export as .mp3 from Audacity or VLC for maximum compatibility.
MIME type
When a .amr file travels over the web, servers label it with this MIME type:
audio/amrThe technical record
For archivists, developers and the merely curious: these are the PRONOM registry entries for .amr.
| Format name | Version | MIME type | PUID |
|---|---|---|---|
| Adaptive Multi-Rate Audio | — | audio/amr | fmt/356 |
| Amazon Kindle eBook File | — | — | fmt/1937 |