| M | MATLAB Source Code File | Audio Files | 10 | 5 |
| M1A | MPEG-1 Audio File |
Audio Files
| 4 | 1 |
| M2 | PC-98 Game Music File |
Audio Files
| 2 | 2 |
| M22 | Farallon's MacRecorder Recording File |
Audio Files
| 1 | 1 |
| M3A | Enhanced M3U Playlist |
Audio Files
| 1 | 1 |
| M3U | Media Playlist File |
Audio Files
| 8 | 1 |
| M3U8 | UTF-8 M3U Playlist File |
Audio Files
| 9 | 1 |
| M3V | DJ Mix Pro Playlist |
Audio Files
| 1 | 1 |
| M4A | MPEG-4 Audio File |
Audio Files
| 7 | 1 |
| M4B | MPEG-4 Audio Book File |
Audio Files
| 4 | 1 |
| M4P | iTunes Music Store Audio File |
Audio Files
| 2 | 1 |
| M4R | iPhone Ringtone File |
Audio Files
| 2 | 1 |
| MA1 | Monarch Audio File |
Audio Files
| 1 | 1 |
| MAP | Quake Engine Map File |
Audio Files
| 36 | 26 |
| MBR | Master Boot Record File |
Audio Files
| 2 | 2 |
| MBU | Sony CAV-M1000ES Memory Backup File |
Audio Files
| 2 | 2 |
| MDC | Multi Dimension Cube File |
Audio Files
| 3 | 3 |
| MDI | Microsoft Document Imaging File |
Audio Files
| 3 | 2 |
| MDL | MathWorks Simulink Model |
Audio Files
| 13 | 8 |
| MDR | ModPlug Compressed Module |
Audio Files
| 3 | 3 |
| MDX | Extended Media Descriptor File |
Audio Files
| 15 | 7 |
| MED | RSView Development Project Archive |
Audio Files
| 9 | 3 |
| MFB | Ensoniq MR 76 Audio Fata |
Audio Files
| 1 | 1 |
| MFF | Cakewalk MIDI Format |
Audio Files
| 1 | 1 |
| MFK | Mafuka Audio File |
Audio Files
| 1 | 1 |
| MG1 | MusiGenesis Project |
Audio Files
| 1 | 1 |
| MG2 | Band-in-a-Box Song File |
Audio Files
| 1 | 1 |
| MGB | Paragon5 Gameboy Tracker Audio |
Audio Files
| 1 | 1 |
| MGU | Band-in-a-Box MIDI Song |
Audio Files
| 1 | 1 |
| MID | MIDI Audio File |
Audio Files
| 9 | 2 |
| MIDI | MIDI File |
Audio Files
| 14 | 1 |
| MIF | FrameMaker Interchange Format File |
Audio Files
| 9 | 7 |
| MINIPSF | Miniature PlayStation Sound Format File |
Audio Files
| 4 | 1 |
| MINIUSF | Nintendo 64 Song File |
Audio Files
| 1 | 1 |
| MIX | Microsoft Image Exchange File |
Audio Files
| 10 | 8 |
| MIZ | Winamp Compressed Midi Audio |
Audio Files
| 1 | 1 |
| MJF | Mjuice MP3 Audio File |
Audio Files
| 1 | 1 |
| MKA | Matroska Audio File |
Audio Files
| 3 | 1 |
| MKF | KaraBox Karaoke Music File |
Audio Files
| 1 | 1 |
| MKW | Compressed Audio File |
Audio Files
| 1 | 1 |
| MLD | I-Melody Format For I-Mode |
Audio Files
| 3 | 3 |
| MLP | Meridian Lossless Packing Audio File |
Audio Files
| 2 | 2 |
| MMF | Microsoft Message File |
Audio Files
| 7 | 4 |
| MMM | Music Maker Arrangement File |
Audio Files
| 4 | 4 |
| MMP | MixMeister Studio Playlist |
Audio Files
| 4 | 4 |
| MO3 | MO3 Audio File |
Audio Files
| 4 | 1 |
| MOD | Amiga Music Module File |
Audio Files
| 20 | 9 |
| MOGG | Multitrack Ogg File |
Audio Files
| 1 | 1 |
| MP1 | MPEG-1 Layer 1 Audio File |
Audio Files
| 4 | 1 |
| MP2 | Heroes Of Might And Magic II Map File |
Audio Files
| 6 | 2 |
| MP3 | MP3 Audio File |
Audio Files
| 17 | 1 |
| MPA | MPEG-2 Audio File |
Audio Files
| 4 | 2 |
| MPC | Musepack Compressed Audio File |
Audio Files
| 11 | 3 |
| MPGA | MPEG-1 Layer 3 Audio File |
Audio Files
| 5 | 1 |
| MPR | Bibexcel Data |
Audio Files
| 9 | 9 |
| MPY | RCA Lyra MP3 Player File |
Audio Files
| 1 | 1 |
| MPZ | Miradi Project File |
Audio Files
| 4 | 4 |
| MP_ | Mobile Phone Sound File |
Audio Files
| 2 | 1 |
| MRA | VilagRadio Recorded Radio Program |
Audio Files
| 1 | 1 |
| MSA | Magic Shadow Archiver Atari Disk Image |
Audio Files
| 2 | 2 |
| MSCZ | MuseScore Compressed Score File |
Audio Files
| 1 | 1 |
| MSQ | Multimedia Workshop Audio File |
Audio Files
| 1 | 1 |
| MSV | Memory Stick Voice File |
Audio Files
| 3 | 2 |
| MT2 | MadTracker 2 Module |
Audio Files
| 3 | 1 |
| MT9 | Music 2.0 Song |
Audio Files
| 1 | 1 |
| MTE | MadTracker 2 Envelope |
Audio Files
| 1 | 1 |
| MTF | Motorola Theme File |
Audio Files
| 5 | 5 |
| MTI | MadTracker Instrument |
Audio Files
| 2 | 1 |
| MTK | MPU-401 Trakker File |
Audio Files
| 2 | 1 |
| MTM | MultiTracker Module |
Audio Files
| 8 | 2 |
| MTP | MadTracker 2 Pattern |
Audio Files
| 1 | 1 |
| MTS | AVCHD Video File |
Audio Files
| 12 | 3 |
| MT_ | Encore Compressed Audio File |
Audio Files
| 1 | 1 |
| MUI | Myriad User Instrument File |
Audio Files
| 2 | 2 |
| MUK | Multak Mini 8162 Encoded Audio Karaoke |
Audio Files
| 1 | 1 |
| MUS | Finale Notation File |
Audio Files
| 4 | 4 |
| MUSICXML | Compressed MusicXML File |
Audio Files
| 2 | 1 |
| MUSX | Finale Notation File |
Audio Files
| 1 | 1 |
| MUX | Trackmania Music File |
Audio Files
| 3 | 2 |
| MUZ | MUZ Audio File |
Audio Files
| 2 | 1 |
| MV3 | Audio Data |
Audio Files
| 1 | 1 |
| MW_ | Audio Utility Midimach Compressed File |
Audio Files
| 1 | 1 |
| MX3 | Mixcraft 3 Audio Project |
Audio Files
| 1 | 1 |
| MXL | Compressed MusicXML File |
Audio Files
| 2 | 1 |
| MXMF | Mobile XMF Ringtone File |
Audio Files
| 1 | 1 |
| MYR | Myriad Music File |
Audio Files
| 2 | 1 |
| MZ | Mozart Compressed File |
Audio Files
| 1 | 1 |
| MZP | MAXScript Zip Package |
Audio Files
| 3 | 3 |
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