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Online Mastering

First available engineer from £85 per track

Not based in the UK? Need a faster turnaround? Unlock the expertise of our mastering engineers from anywhere via our online mastering service. This is a convenient, secure and cost-effective way to get your music finessed by one of our world-class engineers.

Online Mastering
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Mike Hillier

Mastering Engineer


Bastille / Dead Or Alive / Ezra Collective / Faithless / George Ezra / Gabriels / Jockstrap / LP Giobbi / Pip Millett / Raye / Sam Smith / Nathan Evans / Bonobo / Disclosure / Kasabian / Maribou State / Poppy Ajudha / The Cinematic Orchestra / Rag'n'Bone Man / Melanie C / The Streets / Alfa Mist / Genesis / Josienne Clarke


Mike Hillier is a world-class mastering engineer and vinyl mastering expert. He works with local and international music artists and lends his expertise to a wide range of musical styles. Mike takes the time to listen to his clients, understand their music, and bring vibrancy and emotion to the forefront of each track.

Mike returned to Metropolis in 2018, the studio where he began his career as an apprentice to Crispin Murray in 2006. In the interim, Mike worked freelance on all aspects of music production: recording, mixing, mastering, and live production (touring with Ed Harcourt and Mary Epworth; working in venues all across London). As a freelance mastering engineer, Mike was a go-to for the London folk scene, mastering albums for Sophie Jamieson, Patch & The Giant, Ringlefinch, and many others.

From 2004 to 2020, Mike was the Mastering Editor at MusicTech Magazine and was often the first person in the UK to get his hands on new audio equipment. He also teaches new generations of engineers through MusicTech tutorials and guest lectures in audio programs at colleges including SAE and ACM.

Mike brings this educative element to his work and often mentors artists and mixing engineers alongside whom he works.

In addition to being one of Metropolis’s best mastering engineers, he is also the on-site tech genius for the mastering department. He curates the studio’s equipment, tests and reviews new tools for music production, and develops innovative techniques for his clients and colleagues. This technical proficiency maintains the studio’s position at the pinnacle of the world of music mastering.

Sam Smith & Kim Petras

Unholy (Disclosure Remix)

Pip Millett

When Everything Is Better, I'll Let You Know


Escapism. (Live At Metropolis)

Ezra Collective

Apple At Home Session

Dead Or Alive

You Spin Me Round (Like A Record)


In Those Times (Amazon Orginal)


This Feeling

George Ezra

Come On Home For Christmas

George Ezra

Budapest / Did You Hear The Rain


Back To The Future

LP Giobbi

All In A Dream

LP Giobbi

Forever And A Day


Apple At Home Session


I Love You Jennifer B



Maribou State



The Alchemist's Euphoria

The Cinematic Orchestra

To Build A Home

The Cinematic Orchestra

To Believe

Chase & Status

What Came Before



Poppy Ajudha


Alice Merton

The Orangery Session (Amazon Original

Conan Mac

Star Sign

Melanie C

Melanie C


Never Enough

Rag'n'Bone Man

Alone (Orchestral Version - Amazon Original)

Here At Last


Nathan Evans

Ring Ding (A Scotsman's Story)


If You Were Mine (Remixes)


Love of Your Life



Little Mix

Confetti (Blinkie Remix)

Nathan Evans

Told You So

Clean Bandit

Rockabye x Krishna (feat. Sean Paul & Dropgun) [VIP Mash-up]

Django Django

Glowing In The Dark (Django's Iridescent Remix)


The Sparkle Of Love We Saw In You And Me

Mr. Alec Bowman

I Used To Be Sad & Then I Forgot

Felix M-B



Oppenheimer EP

The Anchoress ft. James Dean Bradfield

The Exchange

Nathan Evans

Wellerman (Sea Shanty)


Exit Pt. 1

Emily Mae Winters

High Romance


Search For Nothing

Obe Dve

План побега

Let's Eat Grandma

Deep Six Textbook

Ben Walker

The Fox On The Downs

Mary Epworth


Josienne Clark And Ben Walker

Through The Clouds