| .a2m |
TS-AudioToMIDI Settings File |
| .adg |
Ableton Device Group |
| .aob |
DVD-Audio Audio Object File |
| .aax |
Audible Enhanced Audiobook File |
| .agm |
DTS Multi-channel Pro Packer File |
| .apf |
Adobe Profile File |
| .apl |
Monkey's Audio Track Information File |
| .acb |
Adobe Photoshop Color Book File |
| .acd-bak |
MAGIX ACID Project Backup File |
| .acp |
Alfresco Content Package |
| .ac3 |
Audio Codec 3 File |
| .adts |
Audio Data Transport Stream File |
| .alc |
Ableton Live Clip File |
| .ab |
Android ADB Backup File |
| .adv |
Audio Driver File |
| .agr |
Ableton Groove File |
| .a2i |
Adlib Tracker II Instrument File |
| .a2b |
Adlib Tracker II Instrument Bank |
| .ang |
Anghami Audio File |
| .alaw |
A-Law Compressed Sound Format |
| .ahx |
WinAHX Tracker Module |
| .all |
Java RMI Policy File |
| .ais |
ACDSee Image Sequence File |
| .ay |
AY Chiptune File |