It’s always hard to go into detail about what a mastering engineer does, everyone understand that you try to enhance the audio in different ways but as soon you try to explain how it start to get complicated because every sound is different. Here’s a video that show the enhancement bit where very small changes add up to a huge difference.
What it does not show is how you also adapt the audio so that it will not only translate sound wise but also technically to different media (online, mp3, vinyl, CD, video), we do that in another post.
