The REX file format is created and used by Recycle, an audio application. Recycle gives disc jockeys, producers and musicians software tools for sampling and remixing audio. The program was designed to complement the Reason music-creation software. Many users create audio tracks inside Reason and then remix the tracks in Recycle. You can convert most audio formats into REX files by importing them into Recycle and then saving them as a REX project.
Double-click on and launch Recycle. Create a new project file. Click "File" and then "Save Project As." Type a name for your project, and then click the "OK" button.
Import your audio file into Recycle. Click "File" and then "Import Audio File." Type the name of your audio file into the search bar. Click on the audio file, and then click on the "OK" button to start the import process. Recycle imports either WAV and AIFF audio formats.
Save the Recycle project as a REX file. Click "File" and then click on "Save Project As." Click on the "Format" drop-down menu, and then click the ".REX" tab. Click the "OK" button, which saves the audio file in the REX file format.