Vitrucian-Mod Subdecay Vitruvian Mod ring modulation synthesizer By Brian Marshall|2014-07-19T00:39:06+00:00July 19th, 2014| Share This Story, Choose Your Platform! FacebookXRedditLinkedInTumblrPinterestVkEmail About the Author: Brian Marshall I'm Brian, founder of Subdecay, effects designer, janitor and whatever needs to get done do-er.