| mp4 | Mpeg-4 Audio |
| mp4a | Mpeg-4 Audio |
| mp4bank | Korg Mono/Poly Bank Data |
| mp4prog | Korg Mono/Poly Program |
| mpa | Mpeg Audio File |
| mpcpattern | Akai MPC Software Pattern Data |
| mpeg3 | MPEG Audio Layer 3 File |
| mpga | MPEG Audio Layer 3 File |
| mptm | OpenMPT Module |
| mptmz | OpenMPT Compressed Module |
| mpy | RCA Lyra Audio File |
| mpz | SoundSlimmer Compressed MP3 Audio |
| mp_ | Mobile Phone Sound |
| mqf | Yamaha MidRadio Player Audio |
| msc | AdLib MSCplay Music |
| msnd | NI Maschine v1 Sound Data |
| msp | Magix Music Studio MSP Data |
| mss | Miles Sound System DLS 1 and XMI Data |
| mstr | Miles Sound System 10 Stream Bank |
| msv | Sony Memory Stick Recorded Voice |
| mt2 | MadTracker 2 Music Module |
| mt9 | ETRI MT9 Audio |
| mte | MadTracker Envelope |
| mti | MadTracker Instrument |
| mtk | MPU-401 Trakker Module |
| mtm | MultiTracker Music Module |
| mtp | MadTracker Pattern |
| mts | MadTracker Sample |
| mts | Music Time Pro Music |
| mtx | MadTracker 2 Extension |
