| cda | CD Audio Track |
| cdda | CD Audio Track |
| cdg | CD+G Karaoke File |
| cel | Adobe Audition Loop |
| celt | FMOD CELT Compressed Audio |
| cfa | Adobe Premiere Conformed Audio |
| cff | BoomTracker 4.0 Song |
| ckb | Cricket Audio Bank File |
| ckf | Casio WK-3000 Keyboard File |
| cks | Cricket Audio Stream |
| cmf | Creative Labs Music File |
| csw | Compressed Square Wave |
| cvh | DR-97 Digital Recorder HQ Voice |
| cvs | DR-97 Digital Recorder SP Audio |
| cvs | Continuously Variable Slope Delta Modulation Audio |
| cvsd | Continuously Variable Slope Delta Modulation Audio |
| cvu | CVSD Unfiltered Audio |
| d50 | Roland D-50 Patch |
| dab | Digital Audio Broadcasting File |
| dabp | Opendigitalradio DABPlus Encoded Audio |
| dashsnd | Wusikstation Instrument Data |
| daw | Cubase Recording |
| dewf | SoundEdit Recorded Instrument |
| df2 | Defractor 2 Instrument |
| dfc | Defractor Instrument |
| dff | Direct Stream Digital Interchange File Format Data |
| dh | David Hanney Music |
| dig | Sound Designer Audio |
| dig | Digilink Format Audio Data |
| digi | DIGIBooster Music Module |
| djmusic | Digital Juice Juicer Music |
| dlp | Microsoft DirectMusic Producer Audio |
| dls | Downloadable Sounds File |
| dmc | FamiTracker DPCM Sample |
| dmf | X-Tracker Music Module |