About Doctor Mix – The Online Mastering Experts

Doctor Mix is a division of BBC-acclaimed music label Sunlightsquare Records (London). Specialising in online mastering, mixing and production services, Doctor Mix is was established in 2006 as one of the first online only music studio production service.

Claudio Passavanti is the founder of Doctor Mix and Sunlightsquare Records. A long-established producer, pianist and DJ, his career has taken him from LA, where he studied Orchestral Composing and Arranging, to London and all around the world. As a session musician and producer he has worked for countless artists including Brian Adams, Omar, Paloma Faith, Diana Ross, Danii Minogue, Zucchero, Steve Gadd, John Patitucci. As an artist he's known for his Soul, Latin, Jazz, House and Afro-Cuban music, he is a Traxsource top seller and he performs regularly at festivals and clubs worldwide. In his 3 decades of experience Claudio has produced and engineered commercial releases and film music covering just about every popular genre under the sun. Read Claudio's full biography.

Dimitris Meletis is a music producer, guitarist, pianist and sound engineer with a decade of experience across a wide variety of music genres. With a master in Music Technology at the National & Kapodistrian University Of Athens, Dimitris specialises in Orchestral, Rock, Pop and Electronic production. 

Kay Suzuki is a well established artist, DJ and an long experienced producer of House, Techno, Dub, Ambient and experimental music. He is an expert with Drum machines, Keyboards & Synthesisers, Tape delays and all-things-analogue, as well as an eager vinyl collector.


Established in 2006, Doctor Mix’s London studio complex includes three top production rooms and a group of producers, sound engineers, session musicians and DJs. We love music and equipment, and we get a lot of both! Our production studios are equipped with great analogue and digital gear, and our close collaboration with the top equipment manufacturers and U.K. distributors gives us constant access to the latest and best gear available. We presently collaborate with: Yamaha, Steinberg, Prism Sound, Thermionic Culture, Antelope, Tegeler Audio, Neve, Shadow Hills, Eve Audio, Nova Distribution, Synthax, Bigger Boat, Sable Marketing and KMR. Our studios are acoustically treated by GIK Acoustics.


At Doctor Mix, we have a long history in professional music production, with a client list that includes some of the most notable names in the music and film industry. For these clients, we have become the go-to online mixing and mastering experts.

Our credit list includes: BBE Records (Germany), Big Talk Productions, Brownswood Recordings (UK), CCRE CO (Japan), Club Star (Germany), Decca Records, Dome Records (UK), EMI Virgin, Film 4, Freestyle Records (UK), George V Buddha Bar, Jazz FM (UK), Kudos Distribution, Pschent Music (France), Rambling Records (Japan), Sony Bmg, Studio Canal, Sugar Music (Italy), Universal Music Group, Wavemusic (Germany), Working Title Films (UK).

How we can help you

Today our focus is on providing great sound and great music to independent artists and production companies worldwide. We offer the best online mastering, mixing and music production service out there and we prove it every day with our track record of customer satisfaction.

Please contact Doctor Mix with this contact form.



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