| .cts |
CrazyTalk Script File |
| .ckb |
Cricket Audio Bank File |
| .cwb |
Cakewalk Bundle |
| .conform |
Conformalizer Change List File |
| .cgrp |
Pro Tools Clip Group File |
| .cwt |
Cakewalk SONAR Template |
| .cws |
ChordWizard Song |
| .ckf |
Casio Keyboard File |
| .cfxr |
Cocoa Sfxr File |
| .dss |
DiskStation Backup Configuration File |
| .dcm |
DICOM Image |
| .dcf |
DRM Content Format File |
| .dmse |
Sound Editor Project File |
| .dmsa |
Music Disc Creator Project File |
| .dra |
Nuance Dragon Voice Recording File |
| .dsf |
Delusion Digital Sound File |
| .dwd |
DavkaWriter File |
| .dsp |
Dynamic Studio Professional Module |
| .dvf |
Sony Digital Voice File |
| .dct |
Dictionary File |
| .dm |
Paradox Data Model files, DRM Delivery Message file |
| .dewf |
SoundEdit Recorded Instrument |
| .df2 |
Defractor 2 Instrument |
| .dfc |
Defractor Instrument |