REX files are among the most useful tools for musicians, producers, and remixers who make tempo-based music. But even though this technology has existed for several years, REX (ReCycle export) files are still something of a mystery to most people, who think that you need to have ReCycle to use them. Actually, ReCycle (from Propellerhead) is necessary only for converting an audio file to a REX file. Once an audio file has been ReCycled, or REX'd, it can be used in a Cubase audio track without ReCycle. Many CD-ROMs containing hundreds of REX files are available, so all you have to do is simply import or drag and drop the files into your audio tracks and hit Play. Once they are in your audio tracks, you can change tempos in Cubase and the loops will play back at the selected tempo. This allows you to layer several different loops that may originally have been recorded at different tempos to play back at the tempo you want. Now you can freely work with a variety of loops at any tempo you like. And you don't need to worry about time stretching, which can alter the original loop's sound quality, or experiencing a pitch change as the tempo changes, which is what happens when you work with a sampler. Besides simple playback, you can process and manipulate REX files in ways that are difficult to achieve with ordinary loops.
No it's not because it means shits can copy & paste an awful lot. I have a T-REX file and it wants fuck all to do with computer files