- Love & Laughter Recording
- Love & Laughter Recording
- Loveslap Recording
- Low Overhead Productions
- Lucky Artist Booking
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- Lucky Cat Recording Studio
- Lucky Cat Recordings
- Lunarecording Studio
- Luv N Angels Record Co
- M 2 Communications
- M David Lancette
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- M H Technical Svc
- M Productions
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- Mad Dog Studios Inc
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- Made Men Recording & Dstrbtn
- Madhouse Records
- Magic House Music
- Magic Recording & Production
- Magic Sound
- Magik Universe
- Magnitude Eight Post
- Magnitude Eight Post
- Mai Tai Studios
- Main Street Music
- Main Street Record Room
- Maja's Pialtes-Based Studio
- Majaih Records
- Makin' Tracks Recording
- Makins Productions
- Makins Productions
- Marc Graue Recording
- Marc Scott Studios
- Marc-Watts Studio
- Marcland International Comms
- Marcussen Mastering
- Margarita Mix
- Marhill Records
- Mark Craig Productions
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- Marks Audio Video
- Martinsound Inc
- Marty Rifkin Productions
- Marvel Studios
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- Master Duplicators
- Master Duplicators
- Master Recording Supply Inc
- Master Recording Supply Inc
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- Mastering Lab
- Mastering Lab Studio Products
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- Matrix Entertainment
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- Matter Music
- Matthews Snyder Recording
- Maximus Media Inc
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- MDA Records & Productions
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- MEAC Inc
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- Medtek Net Inc
- Melanie Records
- Men Are Pigs Music
- Mentat Records
- Mentat Records
- Merry Makers Record Co
- Mesa Recording
- Metal Blade Records
- Metronome Studio
- MGA Entertainment Inc
- MGS Studios
- Mic Check Records
- Michael Turner Productions
- Michael's Sound Studio
- Mid-South Audio Recording Stds
- Midi Music Recording & Sound
- Midi Recording Studios
- Mighty Music Productions Inc
- Milan Entertainment Inc
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- Mile High Music
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- Mint Sound Audio
- Mirror Studios
- Missing Link Rekordz
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- Mix It Live
- Mix It Live
- Mix Magic
- Mix Masters
- Mix Room
- Mixing Room Studios
- MJN Design Studio
- MLCA
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- Mob Affiliated Records
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- Mobb Life Entertainment Inc
- Mobile Fidelity Sound Lab Inc
- Mobiltape Co Inc
- Mobius Music
- Mock & Roll
- Mod 7000
- Modern Media Svc
- Money-N-Da Bag Studio
- Monkey Wrench Productions
- Monkeyland Audio NTR
- Monterey Bay Recording Studio
- Monterey Salinas Record
- Mood Indigo Recording Studio
- Moon Productions & Recording
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- Moonshine Studios
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- Morado Music
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- Motion Sound Recording Inc
- Moton Productions & Publishing
- Motor Studios
- Mountain Event Video Inc
- Mountainside Records
- MPR Entertainment
- Mr Toad's
- Muhlstein Studio
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- Multimedia 7
- Musclehead Music
- Muscletone Inc
- Museum Records
- Music Art Recording Studio
- Music Complex
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- Music Forever
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- Music Store Mystic Recording
- Music Studio Jin
- Music Transcription Svc Inc
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- Musicmakers Recording Studio
- Musikhaus
- Mustang
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- Mustin Productions
- Mutato Muzika
- Myke Halpin Studios
- Myron Edwins Productions
- MZM Records
- N House Tape & Disc
- Nail Recording Studio
- Nakamoto Productions
- Naked Eye Listening Production
- Nan Ta Recording Studio
- Nappyhead Entertainment
- National Academy Of Recording
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- National Multimedia Svc
- Nats Entertainment
- NCYTE Records
- Nebo Record Co
- Nelsound Production
- NETUNES.COM
- New Dawn Studios
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- New Mallinium Records
- New Millennium Records
- New Noize Records
- New Vision Entertainment
- New West Records Inc
- NHR One
- Nightwork Records
- Nitram Records
- Nitro Records
- No Equal Music
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- Nomad Productions Inc
- North American Vole
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- Northern Lights Recording
- Nozzle Nose Records
- NRG Recording
- Nsi Sound & Video Inc
- NVE
- NYC West Coast Recording Std
- O T Studios Audio-Cd
- Oaktown Records Entertainment
- Oasis Digital
- Oasis Mastering
- Occidental Studios At Mnsfld
- Ocean Way Recording
- Oceanview Mastering
- Okajima Group Inc
- Old Firehouse Recording Studio
- Olive Street Digital Post
- Omen Room Productions LLC
- Omina Laboratories
- Omni Entertainment Inc
- Omnipresent Films
- On Cue Productions
- On Music & Sound
- On Site Taping Svc
- On The Spot Productions
- One Eleven Studio
- One Heart Multimedia
- One Union Recording Studios
- One Way Studio
- One Way Studio
- One Zero Nine Five Zero Stds
- Orange Coast Media Concepts
- Orange Peal Records
- Orange Peal Records
- Orange Recording
- Orange Tree Productions Inc
- Orange Whip Recording Studios
- Orangewood Recording
- Ordinary Music
- Oroboros Studio
- Ortega Recording Studios
- Oso Music
- Osprey Productions
- Our Earth Music Inc
- Outlaw Sound
- Outlook Music Co
- Outpost Sound Mixing Co
- Pacific Mastering
- Pacific Mobile Recorders
- Pacific Multimedia Corp
- Pacific Multimedia Inc
- Pacific Records
- Pacifique Recording Studio
- Painted Sky Recording Studios
- Painted Sound
- Pajama Recording Studios
- Paladin Entertainment
- Pam Productions
- Papered Up Records
- Paradigm Design Studio
- Paradise Recording
- Paradise Studios
- Paradoxx Sound
- Paramount Recording
- Park Studios
- Parrot Recording Studios
- Pasadena Sound Recorders
- Pat Keogh
- Patricia Powell Recording
- Patterson Associates
- Paul Emery Audio Production
- Paul Rogers Studio
- Paul Stubblebine Mastering
- Pax Stereo
- Payroll Records Inc
- Peak Music Group
- Peak Recording & Consulting
- Pearmain Studios
- Pee Wee Records
- Peep Show Recordz
- Pego Records
- PEKO Records
- Penguin Digital Recording Co
- Penguin Recording
- Pepperland Recording Studio
- Percision Mastering
- Phase Four Studios
- Phil Allen Announcing
