23 21 41 4D 52
Adaptive Multi-Rate ACELP Codec (GSM)
Adaptive Multi-Rate ACELP Codec (GSM). File extension(s): AMR. Kessler type: Multimedia.
Similar magic numbers
| value | name | category |
|---|---|---|
| 23 20 | Cerius2 file | file-signature |
| 23 21 53 49 4C 4B 0A | Skype audio compression | file-signature |
| 41 4D 59 4F | Harvard Graphics symbol graphic | file-signature |
| 23 20 44 69 73 6B 20 44 | VMware 4 Virtual Disk description | file-signature |
| 23 3F 52 41 44 49 41 4E | Radiance High Dynamic Range image file | file-signature |