| 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 |
| 6cm | 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 |
