Compare MPEG-4 Audio and Adaptive Multi-Rate Audio formats — understand the key differences and when to use each
MPEG-4 Audio
MPEG-4 Audio (.m4a) is a audio file format.
Adaptive Multi-Rate Audio
Adaptive Multi-Rate Audio (.amr) is a audio file format.
| Feature | M4A | AMR |
|---|---|---|
| Full Name | MPEG-4 Audio | Adaptive Multi-Rate Audio |
| File Extension | .m4a | .amr |
| Category | audio | audio |
| Free to Convert | ✓ Yes | ✓ Yes |
| Browser Support | ✓ All Browsers | ✓ All Browsers |
| Convert to Each Other | ✓ Yes | ✓ Yes |
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