| qc-emod | QuadraComposer Music Module |
| qcelp | QCELP Compressed Audio |
| qcp | QCELP Compressed Audio |
| qdx | QDesign Audio |
| qmc3 | QQ Music Encrypted MP3 Audio |
| qsf | Capcom QSound Audio Data |
| r1m | RealOne Streaming Media Metadata |
| r2a | Yamaha RS-7000 Archive |
| r2p | Yamaha RS-7000 Pattern |
| r2s | Yamaha RS-7000 Song |
| r36 | Recomposer MIDI Sequence |
| r3a | Yamaha RS-7000 Sample |
| r3p | Yamaha RS-7000 Pattern |
| ra | Real Audio Sound |
| rad | Reality AdLib Tracker Song |
| ram | Real Audio Sound |
| rax | Real Audio Sound |
| rcp | Recomposer MIDI Sequence |
| rcwv | PMRecorder Recorded Audio |
| record | DaveTech GarageBand Records Audio |
| rel | Nokia 5510 Phone Recorded Audio |
| rex | ReCycle Loop Data |
| rex2 | ReCycle REX 2 Audio |
| rf64 | RF64 Audio Data |
| rfl | Reason ReFill Sound Bank |
| rg | Rosegarden Music |
| rgtrack | RealStrat Music Track |
| rhl | EdgeSounds RatHole Compressed Audi |
| rhz | RHZ Ringtone |
| rif | Rockwell ADPCM Format Data |
