I had the pleasure of doing a Pinball Expo seminar with Chris back in 2014. We talked about the history of sound in pinball and also debuted the unused DCS audio music for Twilight Zone that Chris had saved on an old DAC tape. He's honestly just a really great, passionate guy.
Here is the seminar: http://www.pinballnews.com/shows/expo2014/baileygranner.mp3
And yeah, his Yamaha FM synth music is some of the best in the world!