| lvp | Avaya Voice Player Audio |
| lw | LiteWave Compressed Audio File |
| lwv | LiteWave Compressed Audio File |
| Microsoft Agent Linguistically Enhanced Sound File |
| m | NEC PC-98 Music Data |
| m15 | Soundtracker Music |
| m1a | MPEG Audio Layer 1 File |
| m2 | NEC PC-98 Music Data |
| m22 | Farallon MacRecorder Recorded Audio |
| m2a | Mpeg-2 Audio |
| m2e | Yamaha Motif ES Multi Part Editor File |
| m3u | M3U Playlist File |
| m3u8 | M3U Playlist File |
| m4a | iTunes M4A Audio |
| Mpeg-4 Audio |
| m4b | Mpeg-4 Audio Book |
| m4e | Yamaha Motif ES Multi Part Editor File |
| m4p | DRM Protected AAC File |
| m4r | iPhone Ringtone |
| m5m | MachFive Audio Data |
| m7a | Yamaha MO8 Internal User Memory Data |
| ma | MusicAssembler Audio |
| ma1 | Monarch Audio Data |
| mad | Mlat Adlib Tracker Music |
| mamx | Music Animation Machine Music |
| maud | Commodore Amiga IFF Audio |
| maxpat | Max Patch |
| mbnk | Miles Sound System 10 Audio Bank |
| mbnk_digest | Miles Sound System 10 Bank Digest Data |
| mcg | Compressed CD+G Karaoke File |
| mcp | WaveZIP Lossless Compressed Audio |
| mct | Musicator Music |
| mdi | MIDI Music |
| mdl | Digitrakker Music Module |
| mdr | MODPlug Player Compressed Module |
| mdx | Sharp X68000 Audio Data |
| med | OctaMED Music Module |
| 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 |
| miz | Winamp Compressed Midi Audio |
| 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 |
| mmf | SMAF Audio |
| mo3 | MO3 Audio |
| mod | Music Module MOD |
| mogg | Multitrack OGG Audio |
| moh | IMS Music on Hold Data |
| mon | Maniacs of Noise Audio Data |
| mot | Motorola JADE Ringtone |
