| cl3 | NI Battery Audio Data |
| cmf | Creative Labs Music File |
| cmf | SoundFX Macs Opera Tracker Music |
| cmo | Spanish Whiz Audio Data |
| cop | Sam Coupe Audio Data |
| copy | Sony Ericsson Protected Content |
| cpa | Adobe Premiere Pro Conformed Audio |
| crd | Spanish Whiz Card Game Sound |
| csd | CSound Unified Format Audio |
| cseq | Nintendo 3DS Audio Sequence Data |
| csw | Compressed Square Wave |
| cvh | DR-97 Digital Recorder HQ Voice |
| cvs | Continuously Variable Slope Delta Modulation Audio |
| cvs | DR-97 Digital Recorder SP Audio |
| cvsd | Continuously Variable Slope Delta Modulation Audio |
| cvu | CVSD Unfiltered Audio |
| d | SPPack Audio Data |
| d00 | OPL2 FM Audio |
| d01 | OPL2 FM Audio |
| d50 | Roland D-50 Patch |
| dab | Digital Audio Broadcasting File |
| dabp | Opendigitalradio DABPlus Encoded Audio |
| dashsnd | Wusikstation Instrument Data |
| daw | Cubase Recording |
| db | DIGIBooster Music Module |
| dcm | DCM Music Module |
| dewf | SoundEdit Recorded Instrument |
| df2 | Defractor 2 Instrument |
| dfc | Defractor Instrument |
| dff | Direct Stream Digital Interchange File Format Data |
