We accept reference tracks and we accept special instructions if you have a particular idea of how you want the end result to sound. Our engineer will aim to replicate a sound that you wish in your track.
If we can’t do something you ask for, we’ll politely give you direction regarding as we aim to set the right expectation with every project. (Note when sending reference tracks make sure they are at least 320kbps mp3 or WAV.)
More information on what our in-house mastering engineer does with your premasters can be found here - http://symphonicdistribution.com/comprehensive-mastering/