Simplex Grinnell: Corporate Training Video Voice Over Posted by TheGoldenThroatVOs on December 30, 2013 Posted in: Uncategorized. Tagged: corporate, david, gibson, grinnell, narration, simplex, Training, tyco, video, voice, voice-over. Leave a comment Another great job by Motive Learning engineering the audio on the voice over for Simplex Grinnell. Don and Bryce Rock!!