| ad2 | ADPCM 2-bit Compressed Audio |
| ad3 | 3-bit ADPCM Compressed Audio |
| ad4 | 4-bit ADPCM Compressed Audio |
| adg | Ableton Live Device Group |
| adl | Westwood ADL Format Audio |
| adpcm | Dialogic ADPCM Audio File |
| adt | RockeTalk Audio Data |
| adts | Audio Data Transport Stream |
| adx | ADX Encoded Audio |
| aero | Aero Studio Song |
| afc | Mass Effect 2 Audio Data |
| afi | Alesis Fusion Multisample Data |
| afp | Alesis Fusion Program |
| afs | ADX Audio Container |
| afs | Alesis Fusion Audio Sample |
| agm | DTS Multi-channel Pro Packer Audio |
| agr | Ableton Groove File |
| ahx | AHX Encoded Audio |
| aif | Audio Interchange File |
| aifc | Compressed AIFF Audio |
| aiff | Audio Interchange File |
| ais | Velvet Studio Instrument Data |
| akai | Akai S-900 Floppy Disk Image |
| akp | Akai MPC2500 Sampler Program |
| al | A-Law Compressed Audio File |
| al7 | Casio WK-6500 All Data |
| alac | ALAC Encoded Audio |
| alaw | A-Law Compressed Audio File |
| alc | Ableton Live Clip |
| alp | Ableton Live Pack |
