Single Releaases are indeed Mastered. Or at least, they should be.

If you think that tossing the title of "Engineer" out is all you need do, don't expect to be able to reliably get good results every time.

That said, there are softwares and plugins designed to make the Mastering rather easy. Likely the leader of the pack these days would be T-Racks, also check out Ozone.


--Mac