If you've been making music for any amount of time, chances are pretty good that you've heard the terms demo and master tossed around a time or two. Most musicians have a pretty good idea of what a demo is and why they need one, but the concept of the master, and how it differs from a demo, seems to be less understood. Both types of recordings play equally important roles, but they differ in many ways, such as cost and intended use. Let's take a look at the differences between them, as well as when and how each one should (and should not) be used.