Mastering
Even knowing what mastering really involves is beyond what a lot of musicians are familiar with. Having the training, experience, and tools to properly master a recording, whether a single track or a double album, involves a lot of listening, planning, and tweaking. The goal is to unify the sound into a musical whole and get it to sound consistently great on the widest range of playback devices and in the most environments.
For commercial recordings of your original compositions there are a couple of other items, such as ISRC codes and UPC, that we can assist with or advise on.