Fedele de Marco – Darth Phase 17/01/07 at 7.32pm / by rabyn / 0 Comment Meet Fedele de Marco. Below are links to his facebook page, facebook videos, Youtube videos and his website where he shares his perspective on FFT Analyzers, Design, Testing and Calibration of sound reinforcement systems. Facebook page Website – “Il lato oscuro della fase / the dark side of the phase” Facebook videos