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Let me handle the mastering so you can focus on doing what you love.

Elevate Your Sound: Professional Music Mastering
BBC Introducing | Master Music for Radio Airplay
The State of Synth Radio
Online Mastering

The Personal Touch

Hey there, I'm Marc, the brains behind the scenes at Synth Music Mastering, specialising in synthpop music mastering. I understand the frustration that comes with that elusive final 10%, where your incredible work meets the challenge of reaching perfection.


Ever found yourself trapped in a perpetual tweaking cycle, spending hours in the studio surrounded by coffee cups, and your eyes feeling like you've been staring at screens for a lifetime? I've been there, and I get it.

Maybe your mixes are spot-on, and you just need that reliable, thoughtful touch at the mastering stage to push them over the finish line. That's where I come in.

I offer a professional music mastering service that's simple, collaborative, and tailored to put you, your production, and your artist's vision at the forefront. My goal is to bring peace of mind to that crucial final stage of the production process, ensuring everyone involved walks away with a record they truly adore.

If you're tired of the endless self-mastering struggle or seeking a more personal touch than what top-dog mastering houses provide, let's team up and breathe new life into your music!

Marc Matthews, Professional Mastering Engineer and Producer

The first pass of the master came back perfectly

Marc is a very professional and competent engineer. He's also an excellent mentor and has a keen ability to articulate the sometimes confusing world of audio mixing/mastering in a way that's clear and concise. He did an outstanding job on the mastering service I had requested, which came with 3 revisions. None of which is required, since the first pass of the master came back perfectly. Would happily work with Marc again for future projects!


Masteing Process



Defining your vision

In this initial phase, we swiftly align on your artistic vision to ensure a shared understanding. If necessary, I'll assist with any mix adjustments to optimise the mastering process. Additionally, we'll ensure we have all versions ready for mastering, including radio edits and instrumentals.


Crafting Sonic Excellence

Kick back as I delve into your project, leveraging your brief to elevate it to its peak potential. Throughout the mastering process, I prioritise transparent communication, explaining each decision made. While our initial attempt typically hits the mark, I value your input. If you desire any tweaks, the revision process is hassle-free and flexible.


Delivering the Master

After securing your approval, you'll receive an all-encompassing package containing every file type essential for the artist's distribution plan. This includes Hi-Res WAVs, MP3s, Apple Digital Masters, and DDPs (on request) – ensuring you have everything you need for a seamless distribution process!

The best I've ever experienced with mastering engineers

Marc runs a super professional service! I very much enjoyed working with him on the master of a single. The level of attention and involvement was the best I've ever experienced with mastering engineers. Thanks so much!

João Esteves

Masteing Credits


He talked me through every single step

Marc is so professional and incredibly talented. Being a novice to the mix-mastering business, he talked me through every single step and gave video feedback on everything he was doing with the track, he was timely with everything and very well organised, and his communication was immediate. Couldn’t fault my experience. Would use him again in a heartbeat. Thank you Synth Music Mastering.

Claire Jordan

  • What is music mastering?
    Online music mastering is the final stage in the music production process. It involves enhancing and preparing your audio tracks for distribution, ensuring they sound polished and cohesive across different playback systems.
  • Why should I choose online mastering for my music?
    Online mastering offers convenience, allowing you to submit your tracks digitally. It also provides access to professional mastering services regardless of your location, and often offers a quicker turnaround.
  • What file formats do you accept for mastering?
    I accept the highest possible quality WAV/AIFF (PCM) files. Ensure that the exported file matches the original recording specifications; for example, if recorded at 48kHz, export at that level. I have a guide that explains my 5 Top Tips to Prepare a Mix for Mastering. Unfortunately, I cannot accept MP3 files, as this compressed format is not suitable for mastering. If MP3 is your only copy, please inform me, and we can discuss potential solutions. Preferably, submit files in 32Bit Float or dithered 24Bit formats. If you need assistance with preparing your mix files, please don't hesitate to get in touch with me. Ensure that your mix doesn't clip or go over 0dBFS (decibels full scale) to maintain optimal audio quality during the mastering process. Leave one to two seconds of silence before the first waveform (start point) of the track and also after the final audio. Take care to ensure that reverb tails and sustained notes are not cut off. All tracks should be correctly labeled with a song title. For albums or EPs, please number the tracks in order (e.g., 01, 02) to facilitate organisation and sequencing.
  • How do I submit my tracks for mastering?
    You can easily submit your tracks through my online platform. After paying your deposit, you'll be guided through the simple process of uploading your files securely.
  • How long does the mastering process take?
    The turnaround time depends on factors like the complexity of the project and my current workload. Generally, I strive for an efficient turnaround while ensuring the highest quality.
  • Can I attend the mastering session remotely?
    While I don't offer live remote sessions, I keep communication channels open throughout the process. You can provide feedback and discuss your preferences to ensure the final result aligns with your vision.
  • What can I expect from the final mastered product?
    My goal is to enhance your music while preserving your unique sound. You can expect a professionally mastered track with improved clarity, balance, and overall sonic excellence.
  • How much does mastering cost?
    My pricing varies based on the number of tracks and the complexity of the project. Get in touch for a personalised quote.
  • What sets Synth Music Mastering apart from other mastering services?
    I pride myself on a collaborative and personalised approach. My focus on customer service, attention to detail, and commitment to quality sets me apart in delivering a mastering experience that elevates your music.
  • Can I get a test master?
    Certainly! I do offer test mastering services, subject to my availability and you can find out more here.
  • Do you offer revisions?
    Yes, I understand the importance of getting your sound just right. I provide a reasonable number of revisions to ensure you're fully satisfied with the final master.
  • Do you charge extra for additional mix versions, such as Instrumentals or Radio Edits?
    Yes, my pricing typically includes mastering for the main version of your track. However, if you require mastering for additional mix versions like instrumentals, radio edits, or others, we may discuss a reasonable and tailored pricing plan based on your specific needs. Feel free to get in touch to discuss your project requirements, and I'll be happy to provide a personalised quote for the additional mix versions you need.
  • What are Apple Digital Masters, and is Synth Music Mastering certified to provide them?
    Apple Digital Masters (ADM) is a set of specifications crafted by Apple and iTunes engineers to optimise the sound of masters after encoding for the iTunes format. Yes, Synth Music Mastering is certified by Apple to deliver ADM ready masters. This means that all masters created by Synth Music Mastering adhere to ADM specifications at no additional charge. By choosing Synth Music Mastering, your music can receive the ADM/Mastered For iTunes Badge on iTunes/Apple Music releases. If you opt for ADM ready masters, I'll provide the necessary submission information for iTunes/Apple Music through your label or aggregator upon request. Get in touch!
  • Do you offer mastering for vinyl?
    No, I do not offer mastering specifically for vinyl. However, I can certainly guide you in the right direction. I have a network of professional vinyl mastering experts and can provide recommendations tailored to suit the unique requirements of your project. Feel free to get in touch, and I'll assist you in finding the right vinyl mastering solution for your needs.
  • What if I'm not happy with the results of the mastering process?
    Your satisfaction is my priority. If, after multiple rounds of revisions, you are not 100% happy with the results, I offer a full refund of the mastering cost. While I've never had to exercise this option, I want to ensure your comfort throughout the process. It's important to note that this refund policy expires once you have signed off on the project, and your deliverables have been sent through. I am committed to delivering a final product that exceeds your expectations, and my guarantee reflects that commitment to your satisfaction.
  • Do you offer other services?
    Most certainly! I offer comprehensive mixing and coaching services. Whether you're looking to enhance the balance and clarity of your tracks or need assistance in the production phase, I'm here to bring out the best in your music. Feel free to explore the details of my mixing services, and let's collaborate to elevate your sound. Learn more with a free Discovery Call with me today.


The impact was significant and it made my track so much better.

I had an amazing experience working with Marc. He provided detailed video feedback on my mix, guiding me through each step to enhance my track. The impact was significant and it made my track so much better. I highly recommend working with Marc without hesitation.

Year of the Fall

Ready to Release Finish More Songs and Release Music You're Proud Of? 

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