Your Online Mastering Studio

Your sound is our first priority. This is our philosophy which we kept in mind for over a decade working for countless artists, companies, major- and indie labels. Working closely, hand in hand with our clients, we create masters defined by crystal clear sound and overwhelming dynamics without losing track of the mix’s very own core. Heavily relying on hybrid mastering techniques, we combine digital precision with the genuine charme of analog sound. Our work led to several gold & platin status releases and charts rankings. Convince yourself of our quality and become part of the family.

– Michael Conn, Owner/Mastering Engineer

Our Services

Do not accept compromises.
We offer mastering according to your needs.


Sound- amd loudness optimization for digital media.

Stereo Mastering

We enhance the sound of your mix and turn its volume to a competitive level by using analog and digital processing methods – without losing loads of dynamic range.


Multi-track mastering for superior sound.

Stem Mastering

By using special mastering techniques, we optimize your mix’s instrument stems to achieve the best possible balance out of  sound, loudness and dynamic range.



Free feedback on your mix.

Mix Check

Most of the time critical problems within your mix may just reveal at the mastering studio.
To achieve the best possible sound, we offer you mix feedback. For free!


for iTunes

Enhancement for MP3- and streaming services for free.

Mastered for iTunes

MP3- and streaming services do not have to sound bad necessarily. This is why we offer optimized versions for digital releases. This service is free of charge.


We Love our Clients

And we love great sound. These are the main reasons which made us contribute to various gold status releases as well as several jobs for major labels such as Sony Music and Universal Music.

We have selected some relevant releases and company names out of more than 2000 orders to give you an idea of our lovely clients.


Stereo Mastering


Per Song
  • Analog & digital sound optimization
  • Additional versions included
  • Mix check
  • 2 Revisions
  • Wave & MP3 versions
  • Mastered for iTunes

Stem Mastering


Per Song
  • Extensive stem mastering up to 6 stems
  • Analog & digital sound optimization
  • Mix check
  • 2 Revisions
  • Wave & MP3 versions
  • Mastered for iTunes

Get in Touch

Any Questions?

We have got answers.
We will reply within 24 hours. Either use the contact form or directly contact us via mail or phone.

Contact Information

Conn Mastering
Jakobstr. 14
52477 Alsdorf

Phone: +492404 9539500


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