Con Brio's synthesizers were "built by [Tim] Ryan and two Cal Tech chums, Don Lieberman, and Hal Danziger. Con Brio's first model, the Advanced Digital Synthesizer 100 (according to the promo, 'the first synthesizer that deserves to be called a musical instrument') was introduced amid a flurry of publicity in 1980. It never got past the prototype stage."
However, they were able to sell one of their ADS 200's (of two built), but were unable to have any success with their follow-up, the ADS 200R.
[excerpted with permission from the book Vintage Synthesizers by Mark Vail, copyright Miller Freeman, Inc]