Some important guidelines that will help to make our collaboration effective, fun and worthwhile for both sides.

Please make sure to read this page carefully since it represents our fine print.

 Contact, Booking and File Transfer  
To inquire a mastering session, contact us and let us know about the scope and schedule of your project, the formats requested for your release, as well as any notes and suggestions you may have. 


Your inquiry will remain non-committing until we have an agreement for working on your music and fixed a date for the mastering session. 

We use WeTransfer Plus for all file transfers. Feel free to send us your mixes if you're looking for a first no obligation feedback.


Payments can be made via Paypal, by bank transfer, TransferWise or credit card.


Please make sure your payment covers all fees so the billed amount will arrive in our account.

As a new client we will ask you for an advance payment of the agreed fee. In any case, a master is only finished once you are 100% happy with the results. We will send you an invoice in time before the mastering session begins. 

Returning clients will receive an invoice once a master has been approved, a payment within 2 days after billing is appreciated.


While working on a master we're fully dedicated to one project at a time. You can always reach us by email, sometimes texting will make sense during the 'hot' phase of getting everything ready. Also here, the rule is there are no rules since each project and client is unique, and we appreciate this fact.


Once a session has started, you will first receive a proposal for a master of a track of our choice so you can see whether things move in the right direction.


Please make sure you will have the time to check the files we will forward to you.


In order to work efficiently, it is necessary to receive your feedback within 24hrs. In case you will need longer to evaluate the versions we've sent, let us know so we can re-schedule your project until you're ready.

Turnaround time for a stereo master is between 2-7 days once a session has started and depends on the scale of your project and the flow of communication.

 Evaluating and Confirming your Master  

It is necessary for you to double-check the approved final master before sending it out to a pressing plant or releasing your work into the digital realms. By the time you will receive the master files, we will have checked them thoroughly and assume that they are 100% good to go. Please listen again carefully anyway!

When it comes to tips on how to evaluate your master, Justin Perkins has put together this brilliant piece of advice for The ProAudioFiles.

Thanks for reading and for your interest in our work, we look forward to hearing from you! 


Schwebung Mastering

HICOG Estate Bonn

Pennenfeld, Germany