| mes | A2B Player Audio Data |
| mf | MoonFish Audio Track Data |
| mf3 | Ensoniq MR 76 Audio Data |
| mfb | Ensoniq MR 76 Audio Data |
| mg1 | Band-in-a-Box Song |
| mg2 | Band-in-a-Box Song |
| mg3 | Band-in-a-Box Song |
| mg4 | Band-in-a-Box Song |
| mg5 | Band-in-a-Box Song |
| mg6 | Band-in-a-Box Song |
| mg7 | Band-in-a-Box Song |
| mg8 | Band-in-a-Box Song |
| mg9 | Band-in-a-Box Song |
| mgb | Paragon 5 Gameboy Tracker Audio |
| mgu | Band-in-a-Box Song |
| mgv | Yamaha MegaVoice Audio |
| mia | MusicIndiaOnline Trident Player Music |
| mid | MIDI Music |
| midi | MIDI Music |
| mini2sf | Nintendo DS Sound Information Data |
| minigsf | Game Boy Advance GSF Song |
| minipsf | Miniature Portable Sound Format Data |
| miniusf | Nintendo 64 Song |
| mjf | Mjuice Secure Music File |
| mka | Matroska Audio |
| mkf | KaraBox Karaoke Audio |
| mkii | Mark II Sound-System Audio Data |
| mkj | MKJamz Audio File |
| mkw | MKW Compressed Audio |
| ml | MusicLineEditor Audio Data |
| mld | MFi Phone Ringtone |
| mlp | Meridian Lossless Packing Audio |
| mls | Miles Sound System Compressed DLS Data |
| mm4 | MusicMaker V8 Audio |
| mm8 | MusicMaker V8 Audio |
