| 2ch | Super Audio CD Track |
| 2sf | Nintendo DS Sound |
| 2sflib | Nintendo DS Audio Library |
| 32 | Yamaha DX7 RAW 32-voice Data |
| 3ga | 3GP Audio File |
| 3gpa | 3GP Audio File |
| 404 | Muon DS404 Audio Bank |
| 50s | Akai MPC5000 Program |
| 669 | Composer 669 Music Module |
| 6cm | FastTracker 2 Six Channel Module |
| Six Channel Module |
| 8cm | FastTracker 2 Eight Channel Module |
| 8med | OctaMED Music Module |
| 8svx | Amiga 8SVX Sound |
| a2b | Adlib Tracker II Instrument Bank |
| a2f | Adlib Tracker II Instrument with FM-Register Macros |
| a2i | Adlib Tracker II Instrument File |
| a2m | Adlib Tracker II Song |
| a2p | Adlib Tracker II Pattern File |
| a2t | Adlib Tracker II Tiny Module |
| a2w | Adlib Tracker II Instrument Bank with Macros |
| a3k | Yamaha A3000 Sampler Data |
| a3s | Yamaha A3000 Sample |
| aa | Audible Audiobook |
| aa3 | Sony ATRAC3 Compressed Audio |
| aac | Advanced Audio Coding Stream |
| aax | Audible Enhanced Audiobook |
| aaxc | Audible Enhanced Encrypted Audiobook |
| ac1d | AC1D-DC1A Packer Module |
| ac3 | AC-3 Compressed Audio |
| ac7 | Casio WK-3000 AC7 Rythm Data |
| acd-zip | Sony ACID Project With Embedded Media |
| acm | Interplay ACM Audio |
| acp | aacPlus Audio Data |
| ad2 | ADPCM 2-bit Compressed Audio |
| ad3 | 3-bit ADPCM Compressed Audio |
| ad4 | 4-bit ADPCM Compressed Audio |
| adg | Ableton Live Device Group |
| adl | KRISTAL AES-31 ADL Data |
| Westwood ADL Format Audio |
| adpcm | Dialogic ADPCM Audio File |
| adt | Audio Data Transport Stream |
| RockeTalk Audio Data |
| adts | Audio Data Transport Stream |
| adx | ADX Encoded Audio |
| Sega Dreamcast ADX Audio Data |
| aero | Aero Studio Song |
| afc | Mass Effect 2 Audio Data |
| afi | Alesis Fusion Multisample Data |
| afp | Alesis Fusion Program |
| afs | ADX Audio Container |
| Alesis Fusion Audio Sample |
| Sega Dreamcast AFS Audio Data |
| agm | DTS Multi-channel Pro Packer Audio |
| agr | Ableton Groove File |
| ahx | AHX Encoded Audio |
| AHX Tracker Music Module |
| 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 |
| als | Ableton Live Set |
| alw | A-Law Compressed Audio File |
| amb | Ambisonic B-Format Audio |
| amd | AMUSIC Adlib Tracker Music |
| amf | Advanced Module Format Music |
| amr | Adaptive Multi-Rate Audio |
| amr-wb | Adaptive Multi-Rate WideBand Audio |
| ams | Ableton Meta Sound |
| Velvet Studio Music Module |
| amxd | Ableton Max for Live Device |
| ang | Anghami Audio Data |
| aob | DVD Audio Object |
| aon | ArtOfNoise Music Module |
| ap4 | Kids&Us Storybook Audio File |
| apc | A-Pac Compressed Audio |
| ape | Monkey's Audio File |
| apex | AVM Sample Studio Sound Bank |
| apl | Monkey's Audio Link |
| arc | Super Smash Bros Game Archive |
| aria | Chipsounds Sound |
| ariax | Chipsounds XML Sound |
| arl | Aureal Aspen Bank Data |
| arpx8 | TechnoToys Arp-X8 MIDI Arpeggiator Data |
| art | GigaStudio Articulation Data |
| ase | Velvet Studio Sample Data |
| asf | ActiveMovie Streaming Format Data |
| asn | Atlantis Word Processor Sound Scheme |
| asnd | Adobe Soundbooth Audio Data |
| at3 | Sony ATRAC3 Compressed Audio |
| at9 | Sony ATRAC9 Compressed Audio |
| atak | Soundscape Audio-Take Data |
