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O.N.L - Professional Mastering Engineer for Electronic Music & Techno, Paris

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O.N.L

Professional mastering for electronic music

Mix & Mastering

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About

I'm Jean-Charles, a mastering engineer based in Paris.

Since 2020, I've worked on more than 3,500 tracks in electronic music, ranging from techno to hard techno, as well as trance, industrial techno, and hardcore. Coming from a background in DJing and production, I pay close attention to artistic intent, the energy of a track, and how it translates across listening systems, from clubs to streaming platforms.

I see mastering as a decisive final stage. Beyond the technical aspect, it's about bringing coherence, precision, and an external perspective that can elevate a track without altering its identity.

Every project comes with direct communication, honest feedback, and precise advice. I'm personally involved in each session, with the same level of standards from the first message to the final result.

3,500+
Masters
2020
Active since
Free
Mix feedback

Equipment

  • DAW · Ableton Live 12
  • Headphones · Audeze MM-500 / Sennheiser HD 660S
  • Preamp · Apogee Groove
  • Plugins · Fabfilter / Izotope / Weiss / Plugin Alliance / Waves

Services & Pricing

What I offer

Mastering

  • Digital Stereo Mastering

    Tuned for digital releases & club systems

    Most popular
    €50

  • Vinyl Pre-Master

    Optimised for the lathe & vinyl pressing

    €60

  • Digital Stems Mastering

    Up to 6 stems for deeper control on every element

    €65

  • Pack: Digital + Vinyl Pre-Master

    Two formats in one session: digital release + vinyl-ready master

    €80

  • Mix feedback before mastering

    Free

Mix + Digital Master Pack

From raw multitracks to club-ready masters

  • Up to 20 stems

    €195

  • 20 to 50 stems

    €255

  • 50+ stems

    On request

Mixing

  • Multitracks up to 20 stems

    Standard session, ideal for most electronic productions

    €150

  • Multitracks 20+ stems

    Extended session for layered or hybrid productions

    €190

  • Video of the mix session + explanations

    Commented session, private YouTube link

    €50

  • Audio Restoration / Editing / De-noise

    Podcast, vocal cleaning, click, hum, hiss and background noise

    €50/hr

Discounts

5% discount for 4–7 tracks

10% discount for 8+ tracks

Revisions

Mastering: 2 free, additional €15 each

Mixing: 3 free, additional €15 each

Delivery

Last-minute (<5 days): +€15 / track

Prices subject to change
at time of booking.

He is an excellent advisor. He will always try to get the best result for your music. 3 years of collaboration with Dusk Records.
Pablo de Swarte Dusk Records

Selected Works

References

Clients

Trusted by

Artists

Nico Moreno, Vladimir Cauchemar, Todiefor, Nicolas Julian, DYEN, KRL MX, AIROD, Tassery, Abr., Noimage, OMAKS, Schlass, MATRAKK, Lola Cerise, Flymeon, AMRK, DJ Overclock, Pawlowski, Panel Junk, DION MAAS, Skryption, Axel Picodot…

Labels

Insolent Rave Records, Comme dans les films, Black/Plague, Unfair Music, Kapitalist Dance Club, Mass London, Flagrance Records, Rave Alert Records, Dusk Records, Blur, Blackworks, Techno Germany, The Techno's Children, Sindex, COUP, MOTZ, Jaded London, The Finest Techno, Raw, Voight-Kampff, THE BRVTALIST, Normative, Maison Close Records…

Client Reviews

★★★★★

You can tell he really cares about getting the absolute best out of every song.

Ghost R.

SoundBetter · Verified

★★★★★

He doesn't just have a natural ability to hear and enhance the right elements, he understands what the client expects in a way that's rare.

Arthur D.

SoundBetter · Verified

★★★★★

His work is clean and balanced. He takes the time to get everything perfect. Can't wait to work with him again.

Victoria K.

SoundBetter · Verified

★★★★★

His mixing and mastering skills are equally badass. I've been collaborating with him for 2 years and the satisfaction is always there.

MTT

SoundBetter

★★★★★

He is an excellent advisor. He will always try to get the best result for your music. 3 years of collaboration with Dusk Records.

Pablo de Swarte

SoundBetter · Dusk Records

Portfolio

Listen to my work

Mastering by O.N.L

Open on SoundCloud

Process

How it works

01

Send your mix

Upload your files via WeTransfer, Dropbox or Google Drive and send me the link. I'll take care of the rest.

02

Get feedback

Before anything else, you receive detailed notes on your mix: dynamics, balance, EQ. Completely free.

03

Mastering session

I master your track with precision, targeting club and streaming standards without losing punch or dynamics.

04

Final delivery

You receive your master files (WAV, MP3, vinyl version if needed) with 2 revisions included.

Technical Guidelines

How to prepare your track

01

File Format

Export as WAV or AIFF, 24-bit or 32-bit, at 44.1 kHz or higher. Normalize: Off. Dither: Off.

02

Headroom

Keep your master bus below 0 dBTP. Aim for peaks around −6 dBTP. Do not use a limiter to fix clipping. Lower all tracks collectively instead.

03

No Mixbus Processing

Remove all compressors, EQs, stereo wideners, and limiters from the master channel. A clean signal allows for the most effective and high-quality result.

See the full guide, mastering and mixing →

Contact

Ready to work together?

Send me your tracks and I'll get back to you within 24 hours. I reply to every message and always respect agreed deadlines.

Or directly at onl.contact.off@gmail.com

Message sent. I'll get back to you shortly.