REX - the industry standard for audio loops
With REX loops you turn concrete-rigid loops into musical modeling clay, letting you change tempo, pitch and timing independently, and remodel the groove to suit all your musical purposes. Reason ships with more than 900 REX loops in its huge sound bank, but if you want more, there are plenty of companies offering ReFills with the style-specific REX loops you might be looking for.
Reason does a good job at slicing up loops on its own, but if you want to take it one step further: create your own REX loops with ReCycle - the perfect tool for sampled grooves. The REX format is supported in all major music production applications.
Integration with ReCycle
ReWire - the virtual studio connector
If you want to use Reason alongside other music software, use ReWire. Supported by all major music production software proudcts, ReWire takes care of synchronization and audio streaming, letting all ReWired software play together as one. With ReWire, you can use Reason as a virtual instrument rack with ProTools, Cubase, Logic or whatever application you use.
Integration with software
Remote - Reason at the touch of your hand
The Remote technology in Reason takes the pain out of setting up hardware controllers with your music software. There are many advanced control surfaces available on the market, and Reason features support for most of them.
With Remote, Reason can auto detect what control surface is connected up and assign it as the master keyboard. Reason comes with a control mapping for every supported controller that makes tweaking sounds in Reason a very pleasant hands-on experience with full support for motorized faders and parameter displays.
Integration with MIDI controllers