I never met John in person; his legacy can be read about on the net. For me he was the father of the Gnome synthesizer, a simple DIY kit that was one of my starting points into the synthesizer construction. He also wrote a book called "Friendly Stories about Computers/Synthesizers", which detailed interfacing a PAiA 4700 series modular synthesizer with a 6503 microcomputer. One of the programs he wrote, Pink Tunes, is a random tune composer. Larry Fast (Synergy) made a whole album based on that software, and I once succeeded in porting it to my MiMi-a synthesiser.
Rest in peace, John. See you in synthesizer heaven...