| r2a | Yamaha RS-7000 Archive |
| r2p | Yamaha RS-7000 Pattern |
| r2s | Yamaha RS-7000 Song |
| r36 | Recomposer MIDI Sequence |
| r3a | Yamaha RS-7000 Sample |
| 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 |
| rf64 | RF64 Audio Data |
| rfl | Reason ReFill Sound Bank |
| rg | Rosegarden Music |
| rgtrack | RealStrat Music Track |
| rhl | EdgeSounds RatHole Compressed Audi |
| rhz | RHZ Ringtone |
| ring | Grandstream IP Phone Ringtone |
| rjp | Vectordean Music |
| rka | RK Audio Lossless Compressed Audio |
| rmi | MIDI Music |
| rmj | RealJukebox Unsecure Media Clip |
| rmx | RealJukebox Secure Media Clip |
| rng | Nokia Phone Ringtone |
| rns | Reason Audio |
| rol | AdLib Visual Composer Music |
| rso | Lego Mindstorms NXT Brick Audio |
