| bmx | Buzz Music Data |
| bonk | Bonk Audio |
| brr | SNES BRR Audio |
| brsar | BRSAR Audio Package |
| brstm | BRSTM Audio Stream |
| bse | Bedevilled Sound Engine File |
| bun | Cakewalk Bundle Data |
| bwf | Broadcast Wave Format Audio |
| bwg | BrainWave Generator Preset |
| bww | Bagpipe Music Score |
| caf | Core Audio Format |
| caff | Core Audio Format |
| cda | CD Audio Track |
| cdda | CD Audio Track |
| cdg | CD+G Karaoke File |
| cdlx | Audition CD Layout |
| cel | Adobe Audition Loop |
| celt | FMOD CELT Compressed Audio |
| cfa | Adobe Premiere Conformed Audio |
| cff | BoomTracker 4.0 Song |
| cfxr | Cocoa Sfxr |
| ckb | Cricket Audio Bank File |
| ckf | Casio WK-3000 Keyboard File |
| cks | Cricket Audio Stream |
| cmf | Creative Labs Music File |
| conform | Conformalizer Change List |
| copy | Sony Ericsson Protected Content |
| csw | Compressed Square Wave |
| cvh | DR-97 Digital Recorder HQ Voice |
| cvs | DR-97 Digital Recorder SP Audio |
