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photographs: Martin Dijkstra

"Premium Mastering Studio"

"Renzo is a true professional who delivers high quality, he is fast and he's very relaxed to work with. Tnx for the great job Renzo!"
Martijn Spierenburg, Spierenburg Music (composer, sound design, keyboards Black Nazareth, Within Temptation)

Mastering at Masterenzo

Masterenzo Mastering is a premium mastering studio, located in the north of Rotterdam and run by engineer Renzo van Riemsdijk.

After mixes are finished, mastering elevates songs to a professional level and connects them to the outside world. An album should tell a story. Great mastering makes that story loud and clear.

If you'd like to know more about the studio, check out the studio page.

No mixing or recording here, it's mastering only.


My approach is to take the song with the most energy and lift all other songs towards that same level of energy and impact. Mastering is all about energy.

Being a former professional guitarist makes it easier to translate what a musician wants to hear into great sounding masters, connecting to the outside world, straight to your listening audience.

Born in the seventies I'm very much intrigued by the stunning sound quality of some of the recordings made in that era. Just have a listen to 'Rumours' by Fleetwood Mac and witness its pristine production quality and consider: louder is not always better.


Masterenzo Mastering works for independent artists, bands and other projects. Examples are masters for Boudewijn de Groot & Jaco van der Steen, Ocobar and rockband Black Nazareth with members of rock icons Within Temptation and Focus.

Work of Masterenzo can also be heard on radio, television and online platforms, including campaigns for Campina, Auping and Eliza Was Here.

Book your mastering session

You can use the contact form at the bottom of this page to book a session. You can also use the form to send me a message. Are you planning a physical release? Check out the services for more info.

If you want me to listen to your mixes first. No problem, just let me know via the contact form or by email or Whatsapp.

During attended sessions it's important to give the ears some rest during a break in our garden. Bakery Van den Berg makes great sandwiches for lunch and is located at only a 3 minute walk from the studio.

I encourage you to witness the process: attending the session or not, in price there is no difference.

About Masterenzo

Renzo portrait_1Hi! I'm Masterenzo (Renzo van Riemsdijk). Born in 1973 in Ede, a medium sized town in the center of Holland, I discovered guitar at the age of 15. Three years later I was playing electric guitar in my first band.

After a chemistry study in Arnhem I decided to follow my heart and started studying electric guitar at the Rotterdam Conservatory. During my study and after graduating in 1999 I played electric and acoustic guitar and lapsteel in many projects and bands, mainly pop, soul, rock and singer-songwriter music. At that time I was already very interested in the sound of records.

In 2003 this led to the start of my home based mastering studio. After working at home for 6 years I got to work at Rotterdam based studios like the Excess Studios (2009-2012) and the Real Music Room (2012-2015), currently Okapi Recordings.

With the experience gained at those studios I decided to build my very own mastering facility in 2015: Masterenzo Mastering. In 2021 the studio has moved to a slightly bigger location.

Besides mastering I spend my days listening to music, preferably on vinyl or cd. I'm a big fan of chocolat, great coffee and cooking and I like to spend quality time in the great city of Rotterdam, accompanied by some good friends.

Columns Popunie

I write monthly columns about mastering for Dutch music platform Popunie. Is mastering really some kind of black art?

In 2020 I gave an interview about mastering to journalist Lex Bezemer of national newspaper Algemeen Dagblad.

In 2022 I was asked to participate in a music production podcast to talk about mastering as part of a music production.


Included in the price of mastering at Masterenzo:

  • Feedback on your mixes
  • High resolution masters (24 bit)
  • 24 and 16 bit masters optimized for streaming services (Spotify, Deezer, Tidal, Apple Music, YouTube etc.).
    Many of the distributors (aggregators, the party between artist and streaming services) accept 24 bit files.
  • Embedded ISRC codes, when available, to facilitate the distribution of music rights
  • Revision of your masters, until you are 100% satisfied with the end result

Extra services:

  • Compiling files for physical release on vinyl or music cassette
  • Compilation and DDP fileset for CD production
  • Alternative delivery formats (broadcasting)

I encourage you to attend the session: There is no difference in price between an attended or unattended mastering session.

Send your mixes via WeTransfer:


The Masterclass is of a 3 hour private session in the studio in which I will elaborate on the process of mastering. (Analog) processing, workflow and file delivery for vinyl, streaming and CD will come across during the session.

Don't expect to become a mastering engineer in a day but see it as a fun day instead where knowledge, coffee and a look inside the mastering kitchen will provide you the basics of the craft.

The Masterclass is also available as an online meeting with the possibility to invite multiple attendees.

  • A 3 hour private session with 1 or 2 people in the studio
  • A unique insight into mastering audio
  • Get answers to questions you've always wanted to ask to a mastering engineer
  • Coffee or tea are included
  • Price: 220 euro all-in, VAT (btw) included


Learning platform Everlearn asked me to record an online mastering course here in the studio. In over 4 hours I explain what mastering is, what the importance is of a good monitoring environment and what tools I use during a session.

It's a medium-advanced level training for those who want to know more about this beautiful profession or even those who plan to start their own career in mastering.

It can also serve as a reference as all subjects are organized in paragraphs.

Curious? The course is in Dutch.

"The choice for your mastering studio has been a matter of gut feeling.
I'm very thankful for your sincerity, attention and explanation and I really liked the process as well.
In my opinion the tracks sound way better now and I'm very satisfied."

Misha Schreiner (pop, alternative)


Mastering at Masterenzo Mastering is based on a rate of 55 euro per song.
Masters optimised for streaming are included in the price of a master.

The more songs you want to have mastered in one batch or session, the more cost-effective it will become.
Discount starts with 4 songs.

  • Compiling files for a standard 2-sided vinyl release (10" or 12"): 55 euro
  • DDP fileset for CD production: 55 euro
  • Compiling files for a standard 2-sided release on music cassette: 55 euro
  • Alternative masters like instrumentals (with identical settings): 20 euro per song
  • Alternative delivery formats (EBU-R128/EAR): 10 euro per song
  • The Masterclass (1 or 2 people in the studio), 3 hours: 220 euro all-in, VAT (btw) included

Payment via bank transfer (invoice or Tikkie) or cash.

All rates excluding 21% VAT, unless otherwise stated.

If you live outside the Netherlands but within the EU and have a valid VAT-number you don't have to pay the VAT.
If you run a business outside the EU the VAT is taxed in your own country.

"Masterenzo has lifted my end product to a higher level. All details and nuances in the mix have been given subtle accents and the songs have become an album as a whole with some extra drive and shine.
Thanks Renzo, see you again next time!"
John F Klaver, John F Klaver Band (blues, americana, pop)

Practical Information

Preparing your music for mastering

  1. Make sure you've checked and double checked your mixes before sending them off to mastering.
  2. If you need a pair of fresh ears during the mixing stage: I'm more than willing to listen to your mixes and provide feedback.
    All that is necessary to achieve an end product of the highest quality!
  3. Leave some room from the 0 dBFS ceiling when printing mixes to stereo.
    Volume is not that important during mixing.
  4. Send me your best mix. Bus processing is fine as long as it sounds better or holds the mix together.
  5. Never change the sample rate (kHz) of your files.
  6. Send your mixes as 24 bit or 32 bit (float) files (wav or aif). 16 bit or mp3 is not suited for mastering!
    When you send me 24 bit files, it's best practice to use 24 bit dither noise as final step before saving your final mixes (don't use noise shaping).
  7. Don't forget to register for ISRC, it's free! Check the official ISRC site for more info. If you are Dutch, you can apply for an ISRC at Sena. Read more about ISRC on the FAQ page.
  8. Make sure you've checked ánd double checked your mixes before sending them to me!

Loudness, is it really that important?

The human ear is very sensitive when it comes to changes in volume. When a song is played only 1 dB louder many people choose the louder song to be the better sounding one.

But we have control over the volume knob ourselves. so we can play any song as loud as we want.
Loudness normalization ensures that every song in a playlist is played at globally the same volume (loudness).

Actually, music mastered at a lower level contains more energy (transients, micro-dynamics) and sounds genuinly more lively when played at equal volume.

Loudness and Spotify

Without loudness normalization enabled each song on Spotify and its playlists will be played at its original volume. Supplying a loud master will surely cause your music to be played louder.

However: as soon as loudness normalization is enabled, all songs will be normalized to the volume specified by Spotify (and other streaming services). This will cause loud masters to be turned down in volume, resulting in less dynamics and less energy.

During mastering I focus not so much on volume, but on energy and dynamics instead. I believe that every song or album has sort of an "ideal volume" depending on many factors of which genre is an important one.

Many of the streaming services have loudness normalization enabled by default.

Below an example of what happened with Peter Gabriel's 'Sledge Hammer' during the loudness war. Which of the two will sound better when played at equal volume?

"Renzo has mastered the tracks of our first ep, to our fullest satisfaction!
The tracks have become a lot more dynamic, worth every euro. Renzo also is of great help in the production path, from ISRC codes until delivering the end product to the cd factory.
Our next ep and the album will be mastered again by Masterenzo Mastering!"
Jasper van Vught, The Legendary Orchestra Of Love (rock and roll)

More info?

























Columns Popunie




"A driven professional who is able to lay down a beautiful sound and knows very well what the music is asking for."
Dina (singer-songwriter with West African influences)
Albums "Heart" and "My Own Way"

Masterenzo Mastering is approved by Apple to deliver files that meet the Apple Digital Master standard.
More info about Apple Digital Masters? Read the paper.

Apple Digital Master.png

Booking | Contact

Fill in the form and receive a personal quote

Book your Mastering Session

Fill out the form if you want to book a session and receive a personalized mastering quote or if you want to leave me a message.

The more songs you want mastered in one batch or session, the higher the discount on the total price. Discount starts with 4 songs.

Please note that there is no difference in price between an attended or unattended mastering session.


Make sure you've read the guidelines for preparing files for mastering prior to uploading your tracks!

Turnaround time after payment is usually between 1 and 3 days for singles. Are you working on a deadline? Let me know and I'll try to schedule your project with priority.

You can send me your mixes via WeTransfer:

Studio Address

Masterenzo Mastering
Renzo van Riemsdijk
Schielaan 17
3043 HA Rotterdam
The Netherlands

- Free parking -

 telephone.png    06 21 462 953

 envelope.png    renzo[at]



Chamber of Commerce Rotterdam: 24 34 28 39

VAT number: NL001919857B67

© 1973 Masterenzo Mastering | Rotterdam