The basic idea behind stem mastering is to give the mastering engineer a little more than just a stereo file to work with. When done properly by a professional mastering engineer, it can yield some really awesome results.
“Stem Mastering With Mike Wells and Dangerous Music” is a 3 part video series giving you an overview of what it is and why it works so well, then the process of how stem mastering is done, and finally, stem mastering applied. Really solid info here. Enjoy.
darkspideraudio.com 