Mastering
Articles
Record as a CD Mastering Tool by Phi Sequence
So my task a few weeks ago: to turn Propellerhead Record software into a CD mastering tool. Keep in mind most of my tracks were already created in Reason and mostly fully formed. I had 12 tracks to master.
Mastering External Audio In Reason by Craig Anderton
With the addition of the MClass processors in Reason 3, Propellerheads addressed the fact that Reason had been a studio without a mastering suite. Prior to v3, people would export their masterpieces as audio files, then complain about a “wimpy” sound — until the file found its way into the hands of a good mastering engineer. Now much of that kind of work can be done inside Reason itself. For a detailed description of the new MClass processors and how to use them to master material generated within Reason, check out the article ‘Mastering Your Mixes in Reason 3′, in the November 2005 issue of Sound On Sound.
Patches and ReFills
Multiband Toolbox by James Bernard
The Multi-Band Toolbox ReFill uses the Combinator as an effects device and does not contain any “sound” patches at all. It is meant to be used to process either the entire mix of a song by loading one of the patches into the Combinator Mastering Device at the top of the Reason Rack, or as an insert effect after a device that you would like to process.
Videos
Mastering in Reason by WINKsound
Stoni explains how to set up a Mastering Module in Reason 4.0.

