Launches New Propellerhead Reason Training announced the immediate availability of its new Reason:103 REX & FX tutorial video program on Tuesday. The tutorial shows how to properly create REX files and then apply Reasonis built-in DSP effects, explains how dynamic range compression works, and more. Reason:103 REX & FX is available at the Web site as a digital download or on DVD, and is priced at US$39.50.