| opus | Opus Audio File |
| orc | Voyetra Digital Orchestrator Pro Song |
| osp | Orion Sampler Program |
| ots | OtsAV Album |
| p3k | Kurzweil PC3K8 Audio Data |
| p40 | The Player 4.0 Music Module |
| p4x | The Player 4.x Music |
| p50 | The Player 5.0a Module |
| p5b | NI Pro-53 Bank |
| p60 | The Player 6.0 Music Module |
| paal | Cakewalk Pyro Audio Creator Audio Layout |
| pac | SBStudio II Song Package |
| paf | Ensoniq PARIS Audio Data |
| pbf | Turtle Beach Pinnacle Bank Data |
| pca | Sony Perfect Clarity Audio |
| pcg | Korg Trinity Instrument Bank |
| pch2 | Nord Modular G2 Patch |
| pcm | RAW PCM Audio Data |
| pk7 | Casio WK-6500 PK7 Package |
| plm | DisorderTracker2 Music Modules |
| plm | Panasonic SD Voice Editing File |
| pls | DisorderTracker2 Sample Data |
| plst | SmartMusic Playlist |
| pna | PhatNoise Audio |
| pno | Microsoft Windows 8 Piano Song |
| ppc | Adobe Presenter Audio |
| ppcx | Adobe Presenter Audio |
| ppf | Turtle Beach Pinnacle Program |
| prg | WAVmaker Program |
| prlglib | Korg Prologue Sound Bank Data |
