Mastering is the final step in the process in which the finished studio mixes are made ready for distribution.
The final mixes are taken and put into the required running order. The preferred gaps are placed between each of the pieces.
If needed, the mixes can be treated in various ways. They can be equalised, compressed, edited, Stereo enhanced, etc.
Then the level (volume) of each piece is made even, relative to each other.
The final product is then uploaded for online distribution via Spotify, ITunes or similar or sent to the plant for duplication to CD, Cassette, Vinyl etc.
Mastering is done at Solitaire using Valve outboard equipment and WAVES and DUY mastering plugins.