Audio loop format used by ReCycle, a sampled loop creation and editing program; stores audio data and loop slicing information; REX files can be quantized, have the tempo changed, and can be tuned or detuned.
Program(s) that open rex files
Mac / Windows: Propellerhead Software ReCycle or Reason
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/rex
