| 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 |
| 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 |
| atp | Sony ATRAC3 Compressed Audio |
| atrac | Sony ATRAC3 Compressed Audio |
| atrac3 | Sony ATRAC3 Compressed Audio |
| atrac9 | Sony ATRAC9 Compressed Audio |
| au | Sun Audio File |
| aud | Command and Conquer Compressed Audio |
| avr | Audio Visual Research File |
| awb | Adaptive Multi-Rate WideBand Audio |
| axa | Annodex Audio File |
| ay | AY-3-8910 Music |
| aym | Z80 Music Code with AY Music |
| ayn | Ayona Compresed Music |
| azx | ZX Audio File |
| bam | OHRRPGCE Music Data |
| bank | FMOD Audio Bank |
| bars | Nintendo Switch Binary Sound Archive |
| bbsong | Beepola Song |
